—cap /kæp/
noun [C] (COVER)
F0 a small lid or cover:
» The camera has a lens cap to protect the lens surface.Thesaurus+: ↑Lids, covers and stoppersF0 an artificial covering on a tooth that protects it
Thesaurus+: ↑Dentistry , ↑The teeth , ↑Problems with bones, joints and teethnoun [C] (EXPLOSIVE)
► F0 a very small amount of explosive powder in a paper container, used especially in toy guns to produce a loud noiseThesaurus+: ↑Toys and dollsnoun [C] (HAT)
A2 a soft flat hat that has a curved part sticking out at the front, often worn as part of a uniform
See picture: cap 
Thesaurus+: ↑Things worn to cover the head, face or neck
F0 a thin hat that stops your hair getting wet when swimming or taking a shower:
» a shower/swimming capThesaurus+: ↑Things worn to cover the head, face or neckF0 UK a hat given to someone who plays for their national team in a particular sport, or a player who receives this:
» Davis has 17 Scottish caps (= has played for Scotland 17 times).» The team contains five international caps.Thesaurus+: ↑Competitors and participants in sports and games• • •
Extra Examples:» With his white beard and blue cap he looked like an old sea dog.» The captain of the ship wore a peaked cap decorated with gold braid .» He wears his cap whatever the weather.noun [C] (LIMIT)
► F0 a limit on the amount of money that can be charged or spent in connection with a particular activity: » Central government has imposed a cap on local tax increases.Thesaurus+: ↑Limiting and restricting , ↑Preventing and impedingThesaurus+: ↑Negotiating pricesnoun [C] UK (BIRTH CONTROL)
► F0 → DIAPHRAGM(Cf. ↑diaphragm) (BIRTH CONTROL)Thesaurus+: ↑Contraceptionverb (-pp-) (SPORT) ↑Verb Endings for cap
be capped► F0 to play for your national team in a particular sport: » She's been capped for Scotland nine times.Thesaurus+: ↑Competing in sport , ↑Competing and contending (non-sporting)verb [T often passive] (-pp-) (LIMIT) ↑Verb Endings for cap
► C1 to put a limit on the amount of money that can be charged or spent in connection with a particular activity: » High spending councils have all been (rate/charge) capped.» Our mortgage is capped at 8.75 percent for five years.Thesaurus+: ↑Limiting and restricting , ↑Preventing and impedingThesaurus+: ↑Negotiating pricesverb [T] (-pp-) (COVER) ↑Verb Endings for cap
► F0 to cover the top of something: » The mountain was capped with snow.» have your teeth capped (= protected with an artificial covering)Thesaurus+: ↑Edges and extremities of objects , ↑Surfaces of objects