'Twice' definitions:

Definition of 'twice'

(from WordNet)
adverb
Two times; "I called her twice"
adverb
To double the degree; "she was doubly rewarded"; "his eyes were double bright" [syn: doubly, double, twice]

Definition of 'Twice'

From: GCIDE
  • Twice \Twice\ (tw[imac]s), adv. [OE. twies (where the s is the adverbial ending; see -wards), twie, AS. twiges, twiwa; akin to twi- (in comp.) two, G. zwie-, OHG. zwi-, Icel. tv[imac]-, L. bi-, Gr. di-, Skr. dvi-, and E. two. See Two.] [1913 Webster]
  • 1. Two times; once and again. [1913 Webster]
  • He twice essayed to cast his son in gold. --Dryden. [1913 Webster]
  • 2. Doubly; in twofold quantity or degree; as, twice the sum; he is twice as fortunate as his neighbor. [1913 Webster]
  • Note: Twice is used in the formation of compounds, mostly self-explaining; as, twice-born, twice-conquered, twice-planted, twice-told, and the like. [1913 Webster]