Not yet determined or settled; open: Our position on this bill is still undecided.
Not having reached a decision; uncommitted: undecided voters.
noun: pl., -eds.
One, such as a voter, that has not yet reached a decision: “Will this joint interview make up minds among the vast throng of undecideds?” (William Safire)
derivatives
uńde·cid́ed·ly
adverb
uńde·cid́ed·ness
noun
The American Heritage® Dictionary of the English Language, Fourth Edition