definite

Etymology

From Latin dēfīnītus, past participle of dēfīniō, whence also English define.

adj

1. Having distinct limits.
   definite dimensions; a definite measure; a definite period or interval
   […] elements combine in definite proportions […] 1837, William Whewell, chapter 8, in History of the Inductive Sciences, volume 3, book 14, London: John W. Parker, page 145
2. Free from any doubt.
   definite knowledge
3. Determined; resolved; decided.
4. (linguistics) Designating an identified or immediately identifiable person or thing, or group of persons or things
   the definite article

noun

1. (grammar) A word or phrase that designates a specified or identified person or entity.
2. (obsolete) Anything that is defined or determined.