Augment \Aug*ment"\, v. t. [imp. & p. p. Augmented; p. pr. & vb. n. Augmenting.]

[L. augmentare, fr. augmentum an increase, fr. augere to increase; perh. akin to Gr. ?, ?, E. wax, v., and eke, v.: cf. F. augmenter.]

1. To enlarge or increase in size, amount, or degree; to swell; to make bigger; as, to augment an army by re["e]forcements; rain augments a stream; impatience augments an evil.

But their spite still serves His glory to augment. --Milton.

2. (Gram.) To add an augment to.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Augment \Aug*ment"\, v. i. To increase; to grow larger, stronger, or more intense; as, a stream augments by rain.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Augment \Aug"ment\, n. [L. augmentum: cf. F. augment.]

1. Enlargement by addition; increase.

2. (Gram.) A vowel prefixed, or a lengthening of the initial vowel, to mark past time, as in Greek and Sanskrit verbs.

Note: In Greek, the syllabic augment is a prefixed ?, forming an intial syllable; the temporal augment is an increase of the quantity (time) of an initial vowel, as by changing ? to ?.

Source: Webster's Revised Unabridged Dictionary (1913)