If you are undecided, you have not yet made a decision or judgment about something.未拿定主意的,犹豫不决的
Are you still undecided about the new job?对那份新工作你还在犹豫吗?
54 percent of voters were in favour, 30 percent against, and the rest were undecided.54%的投票者赞成,30%的反对,其余的还在观望。
not decided or finished未决定的;未完成的
The whole question is still undecided.整个问题仍然悬而未决。