Having or showing interest.I'm very interested in going to see that play.
(now rare) Motivated by considerations of self-interest; self-serving.
1817, Walter Scott, Rob Roy:they impressed my youthful mind with a sincere aversion to the northern inhabitants of Britain, as a people bloodthirsty in time of war, treacherous during truce, interested, selfish, avaricious, and tricky in the business of peaceful life, and having few good qualities ....