Definition of "Cap" :

noun: a tight-fitting headdress

noun: a top (as for a bottle)

noun: something serving as a cover or protection

noun: the upper part of a column that supports the entablature

noun: (dentistry) dental appliance consisting of an artificial crown for a broken or decayed tooth

noun: a mechanical or electrical explosive device or a small amount of explosive; can be used to initiate the reaction of a disrupting explosive

noun: an upper limit on what is allowed

"They established a cap for prices."

noun: a protective covering that is part of a plant

noun: a fruiting structure resembling an umbrella or a cone that forms the top of a stalked fleshy fungus such as a mushroom

verb: restrict the number or amount of

"We had to cap the number of people we can accept into our club."

verb: lie at the top of

"Snow capped the mountains."