1.a tight-fitting headdress
2.a top (as for a bottle)
3.a mechanical or electrical explosive device or a small amount of explosive; can be used to initiate the reaction of a disrupting explosive
4.something serving as a cover or protection
5.a fruiting structure resembling an umbrella that forms the top of a stalked fleshy fungus such as a mushroom
6.an upper limit on what is allowed;
they established a cap for prices
7.dental appliance consisting of an artificial crown for a tooth
8.the upper part of a column that supports the entablature
1.lie at the top of;
Snow capped the mountains
2.restrict the number or amount of;
We had to cap the number of people we can accept into our club