Definition of "augment"

(transitive) To increase; to make larger or supplement.  examples

(intransitive, reflexive) To grow; to increase; to become greater.  examples

(music) To slow the tempo or meter, e.g. for a dramatic or stately passage.  examples

(music) To increase an interval, especially the largest interval in a triad, by a half step (chromatic semitone).  examples

(grammar, transitive) To add an augment to.  examples

(grammar) In some Indo-European languages, a prefix e- (a- in Sanskrit) indicating a past tense of a verb.  examples

(grammar) In some Bantu languages, an additional vowel prepended to the noun prefix.  examples

An increase.  examples