Open English Wordnet
Adjectives
(s)open, undecided, undetermined, unresolvednot brought to a conclusion; subject to further thought“an open question”, “our position on this bill is still undecided”, “our lawsuit is still undetermined”
(s)on the fence, undecidedcharacterized by indecision“some who had been on the fence came out in favor of the plan”, “too many voters still declare they are undecided”