CLAMP

noun

1. A brace, band, or clasp for strengthening or holding things together.
2. An instrument used to temporarily shut off blood vessels, etc.
3. A parking enforcement device used to immobilise a car until it can be towed or a fine is paid; a wheel clamp.

verb

1. To fasten in place or together with (or as if with) a clamp.
2. To hold or grip tightly.
3. To modify (a numeric value) so it lies within a specific range.