equivocal

Short definition from Wiktionary

Adjective

1. 1
   Having two or more equally applicable meanings; capable of double or multiple interpretation.
2. 2
   Capable of being ascribed to different motives, or of signifying opposite feelings, purposes, or characters; deserving to be suspected.
3. 3
   Uncertain, as an indication or sign.

Noun

1. 1
   A word or expression capable of different meanings; an ambiguous term.