| Definition -
A word that identifies or distinguishes another word without describing or modifying it.
Some types of determiners are:
(1) articles (a, the)
(2) cardinal numbers (three, fifty)
(3) demonstratives (this, those)
(4) indefinite numerals (most, any, each)
(1) All the men are for themselves.
(2) That man is for himself.
Etymology - The word determine derives from the Latin determinare, set limits to (from Latin terminus, end or limit).
Oxford English Dictionary - Its first citation in this sense is from 1933:
"Our limiting adjectives fall into two sub-classes of determiners and numeratives.…"
(Bloomfield Lang. xii. 203)