undecided /ˌʌndɪˈsaɪ̯.dɪd/adjective 2noun 1forms 3 adjective2 •Open and not yet settled or determined.The question of man's destiny is still undecided. •Uncommitted, not having reached a decision.The result of the election is in doubt because of a large number of undecided voters. noun1 •A voter etc. who has not yet come to a decision.The real drama came as these two camps fought for undecideds, who literally found themselves in the middle. — 2008 formsundecideds · more undecided · most undecided