Definitive \De*fin"i*tive\, a. [L. definitivus: cf. F. d['e]finitif.]

1. Determinate; positive; final; conclusive; unconditional; express.

A strict and definitive truth. --Sir T. Browne.

Some definitive . . . scheme of reconciliation. --Prescott.

2. Limiting; determining; as, a definitive word.

3. Determined; resolved. [Obs.]

--Shak.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Definitive \De*fin"i*tive\, n. (Gram.) A word used to define or limit the extent of the signification of a common noun, such as the definite article, and some pronouns.

Note: Definitives . . . are commonly called by grammarians articles. . . . They are of two kinds, either those properly and strictly so called, or else pronominal articles, such as this, that, any, other, some, all, no, none, etc. --Harris (Hermes).

Source: Webster's Revised Unabridged Dictionary (1913)