un ‧ de ‧ cid ‧ ed /ˌʌndɪˈsaɪdəd◂, ˌʌndɪˈsaɪdɪd◂/ BrE AmE adjective
[ Word Family: noun : ↑ decision , ↑ indecision ; adverb : ↑ decidedly , ↑ decisively ≠ ↑ indecisively ; adjective : ↑ decided ≠ ↑ undecided , ↑ decisive ≠ ↑ indecisive ; verb : ↑ decide ]
1 . [not before noun] not having made a decision about something important SYN unsure , uncertain
undecided about
I’m still undecided about how I’ll vote.
undecided what/which/whether etc
Nadine was undecided whether or not to go to college.
2 . a game or competition that is undecided has no definite winner
—undecidedly adverb