To cause to be objectively concerned; to affect, implicate, to involve; = interest, v. 2. Chiefly in passive.

To cause (a person) to have an objective interest or concern in the progress or fate of a matter; to involve; chiefly in passive to be interested.

Of a person or other agent. transitive. To involve (a person) in a matter, situation, undertaking, etc. Obsolete.

passive (or as participial adj.) More generally, to be occupied, engrossed, or embroiled in; to be concerned or associated with.