Verb

1. restrict the number or amount of
2. lie at the top of

Noun

1. a tight-fitting headdress
2. a top (as for a bottle)
3. something serving as a cover or protection
4. the upper part of a column that supports the entablature
5. dental appliance consisting of an artificial crown for a tooth
6. a mechanical or electrical explosive device or a small amount of explosive; can be used to initiate the reaction of a disrupting explosive
7. an upper limit on what is allowed
8. a fruiting structure resembling an umbrella that forms the top of a stalked fleshy fungus such as a mushroom