The Collaborative International Dictionary of English v.0.48:
Abstention \Ab*sten"tion\, a. [F. See Abstain.] The act of abstaining; a holding aloof. --Jer. Taylor. [1913 Webster]WordNet (r) 3.0 (2006):
abstention n 1: the trait of abstaining (especially from alcohol) [syn: abstinence, abstention]