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To make an adjective of; to form or change into an adjective. [R.] Language has as much occasion to adjective the distinct signification of the verb, and to adjective also the mood, as it has to adjective time. It has . . . adjectived all three. Tooke.

A change produced in the blood by exposure to the air in respiration; oxygenation of the blood in respiration; arterialization.

To change into an aëriform state.

Divination from the state of the air or from atmospheric substances; also, forecasting changes in the weather.

An instrument consisting in part of a differential thermometer. It is used for measuring changes of temperature produced by different conditions of the sky, as when clear or clouded.

To act upon; to produce an effect or change upon. As might affect the earth with cold heat. Milton. The climate affected their health and spirits. Macaulay.

Combination in which root words are united with little or no change of form or loss of meaning. See Agglutinative, 2.

Exaggerated representation. By a little aggravation of the features changed it into the Saracen's head. Addison.

The premium or percentage on a better sort of money when it is given in exchange for an inferior sort. The premium or discount on foreign bills of exchange is sometimes called agio.

Exchange business; also, stockjobbing; the maneuvers of speculators to raise or lower the price of stocks or public funds. Vanity and agiotage are to a Parisian the oxygen and hydrogen of life. Landor.

To make a stipulation by way of settling differences or determining a price; to exchange promises; to come to terms or to a common resolve; to promise. Agree with thine adversary quickly. Matt. v. 25. Didst not thou agree with me for a penny Matt. xx. 13.

A concurrence in an engagement that something shall be done or omitted; an exchange of promises; mutual understanding, arrangement, or stipulation; a contract.

To change by alchemy; to transmute. Lovelace.

To become changed into an alkali.

Changeable in color.

A variety of pseudomorph which has undergone partial or complete change or substitution of material; -- thus limonite is frequently an allomorph after pyrite. G. H. Williams.

The property which constitutes an allomorph; the change involved in becoming an allomorph.

A slip of paper attached to a bill of exchange for receiving indorsements, when the back of the bill itself is already full; a rider. [A French usage] Abbott.

To change in physical properties but not in substance. [R.]

To make otherwise; to change in some respect, either partially or wholly; to vary; to modify. "To alter the king's course." "To alter the condition of a man." "No power in Venice can alter a decree." Shak. It gilds all objects, but it alters none. Pope. My covenant will I not break, nor alter the thing that is gone out…