tact

1. The sense of touch; feeling.
2. The stroke in beating time.
3. Sensitive mental touch; special skill or faculty; keen perception or discernment; ready power of appreciating and doing what is required by circumstances; the ability to say the right thing.

   By the use of tact, she was able to calm her jealous husband.

4. A verbal operant which is controlled by a nonverbal stimulus (such as an object, event, or property of an object) and is maintained by nonspecific social reinforcement (praise).

verb

To use a tact (a kind of verbal operant; see noun sense).

1. A maneuver, or action calculated to achieve some end.
2. A maneuver used against an enemy.
3. A sequence of moves that limits the opponent's options and results in an immediate and tangible advantage, typically in the form of material.