Aberrancy of curvature (Geom.), the deviation of a curve from a circular form. [ 1913 Webster ]

2. (Biol.) Deviating from the ordinary or natural type; exceptional; abnormal. [ 1913 Webster ]

The more aberrant any form is, the greater must have been the number of connecting forms which, on my theory, have been exterminated. Darwin. [ 1913 Webster ]

Their own defective and aberrating vision. De Quincey. [ 1913 Webster ]

2. A partial alienation of reason. “Occasional aberrations of intellect.” Lingard. [ 1913 Webster ]

Whims, which at first are the aberrations of a single brain, pass with heat into epidemic form. I. Taylor. [ 1913 Webster ]

3. (Astron.) A small periodical change of position in the stars and other heavenly bodies, due to the combined effect of the motion of light and the motion of the observer; called annual aberration, when the observer's motion is that of the earth in its orbit, and daily or diurnal aberration, when of the earth on its axis; amounting when greatest, in the former case, to 20.4'', and in the latter, to 0.3''. Planetary aberration is that due to the motion of light and the motion of the planet relative to the earth. [ 1913 Webster ]

4. (Opt.) The convergence to different foci, by a lens or mirror, of rays of light emanating from one and the same point, or the deviation of such rays from a single focus; called spherical aberration, when due to the spherical form of the lens or mirror, such form giving different foci for central and marginal rays; and chromatic aberration, when due to different refrangibilities of the colored rays of the spectrum, those of each color having a distinct focus. [ 1913 Webster ]

5. (Physiol.) The passage of blood or other fluid into parts not appropriate for it. [ 1913 Webster ]

6. (Law) The producing of an unintended effect by the glancing of an instrument, as when a shot intended for A glances and strikes B. [ 1913 Webster ]

Syn. -- Insanity; lunacy; madness; derangement; alienation; mania; dementia; hallucination; illusion; delusion. See Insanity. [ 1913 Webster ]

2. A solemn recantation or renunciation; as, an abjuration of heresy. [ 1913 Webster ]

Oath of abjuration, an oath asserting the right of the present royal family to the crown of England, and expressly abjuring allegiance to the descendants of the Pretender. Brande & C. [ 1913 Webster ]

To sham Abraham, to feign sickness. Goldsmith. [ 1913 Webster ]

2. The substance rubbed off. Berkeley. [ 1913 Webster ]

3. (Med.) (a) A superficial excoriation of skin or mucous membranes. AS (b) Erosion of the tooth substance AS [ 1913 Webster ]

The more abstract . . . we are from the body. Norris. [ 1913 Webster ]

2. Considered apart from any application to a particular object; separated from matter; existing in the mind only; as, abstract truth, abstract numbers. Hence: ideal; abstruse; difficult. [ 1913 Webster ]

3. (Logic) (a) Expressing a particular property of an object viewed apart from the other properties which constitute it; -- opposed to concrete; as, honesty is an abstract word. J. S. Mill. (b) Resulting from the mental faculty of abstraction; general as opposed to particular; as, “reptile” is an abstract or general name. Locke. [ 1913 Webster ]

A concrete name is a name which stands for a thing; an abstract name which stands for an attribute of a thing. A practice has grown up in more modern times, which, if not introduced by Locke, has gained currency from his example, of applying the expression “abstract name” to all names which are the result of abstraction and generalization, and consequently to all general names, instead of confining it to the names of attributes. J. S. Mill. [ 1913 Webster ]

4. Abstracted; absent in mind. “Abstract, as in a trance.” Milton. [ 1913 Webster ]

An abstract idea (Metaph.), an idea separated from a complex object, or from other ideas which naturally accompany it; as the solidity of marble when contemplated apart from its color or figure. --
Abstract terms, those which express abstract ideas, as beauty, whiteness, roundness, without regarding any object in which they exist; or abstract terms are the names of orders, genera or species of things, in which there is a combination of similar qualities. --
Abstract numbers (Math.), numbers used without application to things, as 6, 8, 10; but when applied to any thing, as 6 feet, 10 men, they become concrete. --
Abstract mathematics or
Pure mathematics. See Mathematics. [ 1913 Webster ]

1. To withdraw; to separate; to take away. [ 1913 Webster ]

He was incapable of forming any opinion or resolution abstracted from his own prejudices. Sir W. Scott. [ 1913 Webster ]

2. To draw off in respect to interest or attention; as, his was wholly abstracted by other objects. [ 1913 Webster ]

The young stranger had been abstracted and silent. Blackw. Mag. [ 1913 Webster ]

3. To separate, as ideas, by the operation of the mind; to consider by itself; to contemplate separately, as a quality or attribute. Whately. [ 1913 Webster ]

4. To epitomize; to abridge. Franklin. [ 1913 Webster ]

5. To take secretly or dishonestly; to purloin; as, to abstract goods from a parcel, or money from a till. [ 1913 Webster ]

Von Rosen had quietly abstracted the bearing-reins from the harness. W. Black. [ 1913 Webster ]

6. (Chem.) To separate, as the more volatile or soluble parts of a substance, by distillation or other chemical processes. In this sense extract is now more generally used. [ 1913 Webster ]

I own myself able to abstract in one sense. Berkeley. [ 1913 Webster ]

An abstract of every treatise he had read. Watts. [ 1913 Webster ]

Man, the abstract
Of all perfection, which the workmanship
Of Heaven hath modeled. Ford. [ 1913 Webster ]

2. A state of separation from other things; as, to consider a subject in the abstract, or apart from other associated things. [ 1913 Webster ]

3. An abstract term. [ 1913 Webster ]

The concretes “father” and “son” have, or might have, the abstracts “paternity” and “filiety.” J. S. Mill. [ 1913 Webster ]

4. (Med.) A powdered solid extract of a vegetable substance mixed with lactose in such proportion that one part of the abstract represents two parts of the original substance. [ 1913 Webster + AS ]

Abstract of title (Law), a document which provides a summary of the history of ownership of a parcel of real estate, including the conveyances and mortgages; also called brief of title. [ 1913 Webster + PJC ]

Syn. -- Abridgment; compendium; epitome; synopsis. See Abridgment. [ 1913 Webster ]

The evil abstracted stood from his own evil. Milton. [ 1913 Webster ]

2. Separated from matter; abstract; ideal. [ Obs. ] [ 1913 Webster ]

3. Abstract; abstruse; difficult. [ Obs. ] Johnson. [ 1913 Webster ]

4. Inattentive to surrounding objects; absent in mind. “An abstracted scholar.” Johnson. [ 1913 Webster ]

A wrongful abstraction of wealth from certain members of the community. J. S. Mill. [ 1913 Webster ]

2. (Metaph.) The act process of leaving out of consideration one or more properties of a complex object so as to attend to others; analysis. Thus, when the mind considers the form of a tree by itself, or the color of the leaves as separate from their size or figure, the act is called abstraction. So, also, when it considers whiteness, softness, virtue, existence, as separate from any particular objects. [ 1913 Webster ]

☞ Abstraction is necessary to classification, by which things are arranged in genera and species. We separate in idea the qualities of certain objects, which are of the same kind, from others which are different, in each, and arrange the objects having the same properties in a class, or collected body. [ 1913 Webster ]

Abstraction is no positive act: it is simply the negative of attention. Sir W. Hamilton. [ 1913 Webster ]

3. An idea or notion of an abstract, or theoretical nature; as, to fight for mere abstractions. [ 1913 Webster ]

4. A separation from worldly objects; a recluse life; as, a hermit's abstraction. [ 1913 Webster ]

5. Absence or absorption of mind; inattention to present objects. [ 1913 Webster ]

6. The taking surreptitiously for one's own use part of the property of another; purloining. [ Modern ] [ 1913 Webster ]

7. (Chem.) A separation of volatile parts by the act of distillation. Nicholson. [ 1913 Webster ]