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rbance in the regular elliptic or other motion of a heavenly body, produced by some force additional to that which causes its regular motion; as, the perturbations of the planets are caused by their attraction on each other. Newcomb.

The equivalent of an additional circuit or wire, in reality not existing, obtained by certain arrangements of real circuits, as in some multiplex telegraph systems.

Any additional or auxiliary mass of masonry used to stiffen a wall. See Buttress.

Hence, in a literary sense, additional; real; actual. Success goes invariably with a certain plus or positive power. Emerson. Plus sign (Math.), the sign (+) which denotes addition, or a positive quantity.

To fill up and finish the joints of (a wall), by introducing additional cement or mortar, and bringing it to a smooth surface.

An additional or subsequent entry.

That which forms an additional length.

To make lively, active, or sprightly; to impart additional energy to; to stimulate; to make quick or rapid; to hasten; to accelerate; as, to quicken one's steps or thoughts; to quicken one's departure or speed.

Combination a second or additional time.

ort; as, to reënforce an argument; to reënforce a garment; especially, to strengthen with additional troops, as an army or a fort, or with additional ships, as a fleet. [Written also reinforce.]

That which reënforces; additional force; especially, additional troops or force to augment the strength of any army, or ships to strengthen a navy or fleet.

The process of applying additional colors, by applications of printing blocks, to patterns already partly colored.

Another, or an additional, separation into parts.

her document, which is attached on a separate piece of paper; in legislative practice, an additional clause annexed to a bill while in course of passage; something extra or burdensome that is imposed. After the third reading, a foolish man stood up to propose a rider. Macaulay. This [question] was a rider which Mab fou…

Among the Mormons, to confirm or set apart as a second or additional wife. [Utah, U.S.] If a man once married desires a second helpmate . . . she is sealed to him under the solemn sanction of the church. H. Stansbury.

o, in the United States, a sum of money or other property formerly granted to a pastor in additional to his salary.

An additional piece fastened to the keel of a boat to prevent lateral motion. See Skeg.

Anything which alleviates or compensates for suffering or loss; a compensation; esp., an additional allowance, as for injured feelings.

In an increasing or additional degree; even more; -- much used with comparatives. The guilt being great, the fear doth still exceed. Shak.

An additional remark. [R.]