cap

(noun) a tight-fitting headdress.

(noun) a top (as for a bottle).

(noun) a mechanical or electrical explosive device or a small amount of explosive; can be used to initiate the reaction of a disrupting explosive. Synonyms: detonator, detonating device.

(noun) something serving as a cover or protection.

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

(noun) a protective covering that is part of a plant. Synonyms: hood.

(noun) an upper limit on what is allowed. Synonyms: ceiling, roof. Examples: "He put a ceiling on the number of women who worked for him." "There was a roof on salaries." "They established a cap for prices."

(noun) (dentistry) dental appliance consisting of an artificial crown for a broken or decayed tooth. Synonyms: crown, crownwork, jacket, jacket crown. Example: "Tomorrow my dentist will fit me for a crown."

(noun) the upper part of a column that supports the entablature. Synonyms: capital, chapiter.

(verb) lie at the top of. Synonyms: crest. Example: "Snow capped the mountains."

(verb) restrict the number or amount of. Example: "We had to cap the number of people we can accept into our club."