2. (Med) Total lack of oxygen. [ AS ]

2. Greatly deficient in, or totally lacking, oxygen. [ PJC ]

2. Near correctness; nearly exact; not perfectly accurate; as, approximate results or values. [ 1913 Webster ]

Approximate quantities (Math.), those which are nearly, but not, equal. [ 1913 Webster ]

To approximate the inequality of riches to the level of nature. Burke. [ 1913 Webster ]

2. To come near to; to approach. [ 1913 Webster ]

The telescope approximates perfection. J. Morse. [ 1913 Webster ]

The largest capacity and the most noble dispositions are but an approximation to the proper standard and true symmetry of human nature. I. Taylor. [ 1913 Webster ]

2. An approach to a correct estimate, calculation, or conception, or to a given quantity, quality, etc. [ 1913 Webster ]

3. (Math.) (a) A continual approach or coming nearer to a result; as, to solve an equation by approximation. (b) A value that is nearly but not exactly correct. [ 1913 Webster ]

2. The journal box of a rotating axle, especially a railway axle. [ 1913 Webster ]

☞ In railway construction, the axle guard, or pedestal, with the superincumbent weight, rests on the top of the box (usually with a spring intervening), and holds it in place by flanges. The box rests upon the journal bearing and key, which intervene between the inner top of the box and the axle. [ 1913 Webster ]

2. (aviation) a device which maintains a record of cockpit conversations and the readings of many of the instruments on board an aircraft, continuously or at frequent time intervals during a flight. It is of rugged design to withstand a violent crash, and is used to determine the causes of aircraft accidents. They are often brightly colored to assist recovery, not actually black. [ PJC ]

Box elder, the ash-leaved maple (Negundo aceroides), of North America. --
Box holly, the butcher's broom (Russus aculeatus). --
Box thorn, a shrub (Lycium barbarum). --
Box tree, the tree variety of the common box. [ 1913 Webster ]

1. To inclose in a box. [ 1913 Webster ]

2. To furnish with boxes, as a wheel. [ 1913 Webster ]

3. (Arch.) To inclose with boarding, lathing, etc., so as to bring to a required form. [ 1913 Webster ]

To box a tree, to make an incision or hole in a tree for the purpose of procuring the sap. --
To box off, to divide into tight compartments. --
To box up. (a) To put into a box in order to save; as, he had boxed up twelve score pounds. (b) To confine; as, to be boxed up in narrow quarters. [ 1913 Webster ]

A good-humored box on the ear. W. Irving. [ 1913 Webster ]

To box off (Naut.), to turn the head of a vessel either way by bracing the headyards aback. --
To box the compass (Naut.), to name the thirty-two points of the compass in their order. [ 1913 Webster ]

2. enclosed in a box. [ PJC ]

The faded hue of sapless boxen leaves. Dryden. [ 1913 Webster ]

2. Material used in making boxes or casings. [ 1913 Webster ]

3. Any boxlike inclosure or recess; a casing. [ 1913 Webster ]

4. (Arch.) The external case of thin material used to bring any member to a required form. [ 1913 Webster ]

Boxing glove, a large padded mitten or glove used in sparring for exercise or amusement. [ 1913 Webster ]