**De*ter"mi*nant** (?), a. [L. *determinans*, p. pr. of *determinare*: cf. F. *d'eterminant*.]

Serving to determine or limit; determinative.

© Webster 1913.

**De*ter"mi*nant**, n.

**1.**

That which serves to determine; that which causes determination.

**2.** Math.

The sum of a series of products of several numbers, these products being formed according to certain specified laws; thus, the *determinant* of the nine numbers a, b, c,a', b', c',a'', b'', c'', is a b' c'' - a b'' c' + a' b'' c] -
a' b c'' + a'' b' c. The theory of *determinants* forms a very important branch of modern mathematics.

**3.** Logic

A mark or attribute, attached to the subject or predicate, narrowing the extent of both, but rendering them more definite and precise.

*Abp. Thomson.*

© Webster 1913.