Search Result for "optionally": 
Wordnet 3.0

ADVERB (1)

1. in an optional manner;
- Example: "this rule is applied optionally"



The Collaborative International Dictionary of English v.0.48:

Optionally \Op"tion*al*ly\, adv.
   In an optional manner.
   [1913 Webster]


WordNet (r) 3.0 (2006):

optionally
    adv 1: in an optional manner; "this rule is applied optionally"
           [ant: obligatorily]