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