What is the meaning of cap?

noun

• A tight-fitting headdress.
• A top (as for a bottle. )
• 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
• Something serving as a cover or protection.
• A fruiting structure resembling an umbrella or a cone that forms the top of a stalked fleshy fungus such as a mushroom.
  • synonyms: pileus
• A protective covering that is part of a plant.
  • synonyms: hood
• An upper limit on what is allowed.
  • usage: "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"
  • synonyms: ceiling, roof
• Dentistry) dental appliance consisting of an artificial crown for a broken or decayed tooth. (
  • usage: "tomorrow my dentist will fit me for a crown"
  • synonyms: crown, crownwork, jacket, jacket crown
• The upper part of a column that supports the entablature.
  • synonyms: capital, chapiter

verb

• Lie at the top of.
  • usage: "Snow capped the mountains"
  • synonyms: crest
• Restrict the number or amount of.
  • usage: "We had to cap the number of people we can accept into our club"