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1. A close-fitting hat, either without a brim or with a peak
    
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
   - detonator, detonating device
    
4. Something serving as a cover or protection
    
5. A fruiting structure resembling an umbrella or a cone that forms the top of a stalked fleshy fungus such as a mushroom
   - pileus
    
6. A protective covering that is part of a plant
   - hood
    
7. An upper limit on what is allowed
   "they established a cap for prices";
   - ceiling, roof
    
8. (dentistry) dental appliance consisting of an artificial crown for a broken or decayed tooth
   "tomorrow my dentist will fit me for a cap";
   - crown, crownwork, jacket, jacket crown
    
9. The upper part of a column that supports the entablature
   - capital, chapiter

1. Lie at the top of
   "Snow capped the mountains";
   - crest
    
2. Restrict the number or amount of
   "We had to cap the number of people we can accept into our club"
    
3. Finish or complete, as with some decisive action
   "he capped off the meeting with a radical proposal";
   - cap off
    
4. Top or seal with a cover; put a cap on
    
5. Surpass or outdo

Derived forms: caps, capping, capped

Type of: circumscribe, clear up, confine to, control, cover, covering, dental appliance, explosive device, finish off, finish up, get through, headdress, headgear, lie, limit, mop up, natural covering, plant part, plant structure, polish off [informal], protection, protective cover, protective covering, top, wrap up [informal]

Part of: column, flora, fungus, pillar, plant, plant life

Encyclopedia: Cap