1.AdjectiveAble to be acted on; able to be used as the basis for taking action.
2.AdjectiveAffording grounds for legal action.
"I'm sure it's not good of me to write that he's a lush, but is it actionable?; Clearly the libelous book is actionable, but I'm not commenting on anything to do with legal issues."
3.NounThat can be acted on; that can be used as the basis for taking action.