Source : Webster's Revised Unabridged Dictionary (1913)

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 : WordNet®

augmented
     adj : added to or made greater in amount or number or strength;
           "his augmented renown"; "a greatly augmented collection
           of books"