hat
noun /hæt/
  /hæt/
Idioms 
enlarge imagea piece of clothing made to fit the head, often with a brim (= a flat edge that sticks out), usually worn out of doors- a straw/woolly hat
 - to wear a hat
 - to put on/take off a hat
 - to have a hat on
 
Extra ExamplesTopics Clothes and Fashiona1- He placed a battered felt hat on his head.
 - He pulled his hat down over his face.
 - The doorman tipped his hat as we entered.
 - The governor wore a cocked hat trimmed with white feathers.
 - a riding hat
 - a top hat
 
Oxford Collocations Dictionaryadjective- broad-brimmed
 - wide-brimmed
 - floppy
 - …
 
- don
 - place
 - doff
 - …
 
- be trimmed with something
 
- box
 - shop
 - store
 - …
 
- (informal) a position or role, especially an official or professional role, when you have more than one such role
- I'm wearing two hats tonight—parent and teacher.
 - I'm telling you this with my lawyer's hat on, you understand.
 
 see also cocked hat, hi-hat, old hat 
Word OriginOld English hætt, of Germanic origin; related to Old Norse hǫttr ‘hood’, also to hood.
Idioms 
at the drop of a hat 
- immediately; without hesitating
- The company can't expect me to move my home and family at the drop of a hat.
 
 
go hat in hand (to somebody) (especially North American English) 
(British English usually go cap in hand (to somebody))
- to ask somebody for something, especially money, in a very polite way that makes you seem less important
 
hang your hat 
- (North American English, informal) to live in a particular place
- These multimillion-dollar homes are more than just a place to hang your hat.
 
 
hang your hat on something 
- (North American English, informal) to depend or rely on something
- The research is interesting, but you cannot hang your hat on it.
 
 
my hat 
- (old-fashioned) used to express surprise                                     
 
I’ll eat my hat 
- (informal) used to say that you think something is very unlikely to happen
- If she's here on time, I'll eat my hat!
 
 
I take my hat off to somebody | hats off to somebody (both especially British English) 
(North American English usually I tip my hat to somebody)
- (informal) used to say that you admire somebody very much for something they have done related noun hat tip
 
keep something under your hat 
- (informal) to keep something secret and not tell anyone else
 
knock somebody/something into a cocked hat 
- (British English, old-fashioned) to be very much better than somebody/something
- She knocks the rest of the cast into a cocked hat.
 
 
out of a/the hat 
- if something such as a name is picked out of a/the hat, it is picked at random from a container into which all the names are put, so that each name has an equal chance of being picked, in a competition, etc.                                     
 
pass the hat round/around 
- (informal) to collect money from a number of people, for example to buy a present for somebody
 
pull something/a rabbit out of the hat 
- (informal) to suddenly produce something as a solution to a problem
 
talk through your hat 
- (old-fashioned, informal) to say silly things while you are talking about a subject you do not understand
 
throw your hat into the ring 
- to announce officially that you are going to compete in an election, a competition, etc.
 
