capping

noun

1. The act of removing one's hat as a token of respect.

2. (geology) Rock that overlies a mineral deposit.

3. The process of covering a borehole in order to seal an oil well.

4. The selling of a security etc. close to an expiry date.

5. (mathematics) The conversion of a polyhedron into a stellated polyhedron by raising a pyramid on each face.

verb

1. present participle of cap