Etymology
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undecided (adj.)

1530s, "not decided, unsettled," from un- (1) "not" + past participle of decide (v.).

updated on May 20, 2012

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Definitions of undecided from WordNet

undecided (adj.)
characterized by indecision;
too many voters still declare they are undecided
Synonyms: on the fence
undecided (adj.)
not brought to a conclusion; subject to further thought;
our position on this bill is still undecided
undecided (adj.)
not yet having made a commitment;
undecided voters
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.