Not yet determined or settled; open: Our position on this bill is still undecided.
Not having reached a decision; uncommitted: undecided voters.
n.
pl.un·de·cid·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). un'de·cid'ed·ly adv., un'de·cid'ed·ness n.