Dull and addle-pated. Dryden. [ 1913 Webster ]

2. an island country in the Persian Gulf.
Syn. -- Bahrein. [ WordNet 1.5 ]

2. of, pertaining to, or characteristic of Bahrain. Bahraini beaches. [ WordNet 1.5 ]

1. (Anat.) The whitish mass of soft matter (the center of the nervous system, and the seat of consciousness and volition) which is inclosed in the cartilaginous or bony cranium of vertebrate animals. It is simply the anterior termination of the spinal cord, and is developed from three embryonic vesicles, whose cavities are connected with the central canal of the cord; the cavities of the vesicles become the central cavities, or ventricles, and the walls thicken unequally and become the three segments, the fore-, mid-, and hind-brain. [ 1913 Webster ]

☞ In the brain of man the cerebral lobes, or largest part of the forebrain, are enormously developed so as to overhang the cerebellum, the great lobe of the hindbrain, and completely cover the lobes of the midbrain. The surface of the cerebrum is divided into irregular ridges, or convolutions, separated by grooves (the so-called fissures and sulci), and the two hemispheres are connected at the bottom of the longitudinal fissure by a great transverse band of nervous matter, the corpus callosum, while the two halves of the cerebellum are connected on the under side of the brain by the bridge, or pons Varolii. [ 1913 Webster ]

2. (Zool.) The anterior or cephalic ganglion in insects and other invertebrates. [ 1913 Webster ]

3. The organ or seat of intellect; hence, the understanding; as, use your brains. “ My brain is too dull.” Sir W. Scott. [ 1913 Webster ]

☞ In this sense, often used in the plural. [ 1913 Webster ]

4. The affections; fancy; imagination. [ R. ] Shak. [ 1913 Webster ]

5. a very intelligent person. [ informal ] [ PJC ]

6. the controlling electronic mechanism for a robot, guided missile, computer, or other device exhibiting some degree of self-regulation. [ informal ] [ PJC ]

To have on the brain, to have constantly in one's thoughts, as a sort of monomania. [ Low ] --
no-brainer a decision requiring little or no thought; an obvious choice. [ slang ] [ 1913 Webster ]

Brain box or
Brain case, the bony or cartilaginous case inclosing the brain. --
Brain coral,
Brain stone coral (Zool.), a massive reef-building coral having the surface covered by ridges separated by furrows so as to resemble somewhat the surface of the brain, esp. such corals of the genera Mæandrina and Diploria. --
Brain fag (Med.), brain weariness. See Cerebropathy. --
Brain fever (Med.), fever in which the brain is specially affected; any acute cerebral affection attended by fever. --
Brain sand, calcareous matter found in the pineal gland. [ 1913 Webster ]

1. To dash out the brains of; to kill by beating out the brains. Hence, Fig.: To destroy; to put an end to; to defeat. [ 1913 Webster ]

There thou mayst brain him. Shak. [ 1913 Webster ]

It was the swift celerity of the death . . .
That brained my purpose. Shak. [ 1913 Webster ]

2. To conceive; to understand. [ Obs. ] [ 1913 Webster ]

'T is still a dream, or else such stuff as madmen
Tongue, and brain not. Shak. [ 1913 Webster ]

If th' other two be brained like us. Shak. [ 1913 Webster ]

2. to to indoctrinate forcibly or by means of torture, or by constant psychological pressure.
Syn. -- submit to brainwashing. [ WordNet 1.5 ]

2. the clear (and often sudden) understanding of a complex situation.
Syn. -- insight, brainstorm. [ WordNet 1.5 ]

2. highly intelligent. [ PJC ]

He binds in chains
The drowsy prophet, and his limbs constrains. Dryden. [ 1913 Webster ]

When winter frosts constrain the fields with cold. Dryden. [ 1913 Webster ]

2. To bring into a narrow compass; to compress. [ 1913 Webster ]

How the strait stays the slender waist constrain. Gay. [ 1913 Webster ]

3. To hold back by force; to restrain; to repress. [ 1913 Webster ]

My sire in caves constrains the winds. Dryden. [ 1913 Webster ]

4. To compel; to force; to necessitate; to oblige. [ 1913 Webster ]

The love of Christ constraineth us. 2. Cor. v. 14. [ 1913 Webster ]

I was constrained to appeal unto Cæsar. Acts xxviii. 19. [ 1913 Webster ]

5. To violate; to ravish. [ Obs. ] Shak. [ 1913 Webster ]

6. To produce in such a manner as to give an unnatural effect; as, a constrained voice.

Syn. -- To compel; force; drive; impel; urge; press. [ 1913 Webster ]

Long imprisonment and hard constraint. Spenser. [ 1913 Webster ]

Not by constraint, but by my choice, I came. Dryden.

Syn. -- Compulsion; violence; necessity; urgency. -- Constraint, Compulsion. Constraint implies strong binding force; as, the constraint of necessity; the constraint of fear. Compulsion implies the exertion of some urgent impelling force; as, driven by compulsion. The former prevents us from acting agreeably to our wishes; the latter forces us to act contrary to our will. Compulsion is always produced by some active agent; a constraint may be laid upon us by the forms of civil society, or by other outward circumstances. Crabb. [ 1913 Webster ]

Contraindicating symptoms must be observed. Harvey. [ 1913 Webster ]

If the stuff proves crossgrained, . . . then you must turn your stuff to plane it the contrary way. Moxon. [ 1913 Webster ]

2. Perverse; untractable; contrary; difficult to deal with.
Syn. -- balky, contrarious. [ 1913 Webster + WordNet 1.5 ]

She was none of your crossgrained, termagant, scolding jades. Arbuthnot. [ 1913 Webster ]

2. To rend; to tear. [ Obs. ] [ 1913 Webster ]

Neither guile nor force might it [ a net ] distrain. Spenser. [ 1913 Webster ]

3. (Law) (a) To seize, as a pledge or indemnification; to take possession of as security for nonpayment of rent, the reparation of an injury done, etc.; to take by distress; as, to distrain goods for rent, or of an amercement. (b) To subject to distress; to coerce; as, to distrain a person by his goods and chattels. [ 1913 Webster ]

Upon whom I can distrain for debt. Camden. [ 1913 Webster ]