keep (something) under one's hat

idiom
Updated on: 15 Nov 2017

Definition of keep (something) under one's hat

: to keep (something) secret : to not tell anyone about (something)
  • I'll tell you what happened, but you have to keep it under your hat.

Word by Word Definitions

keep play
  1. : to retain in one's possession or power

  2. : to refrain from granting, giving, or allowing

  3. : to have in control

  1. : the means or provisions by which one is kept

  2. : one that keeps or protects: such as

  3. : fortress, castle

something play
  1. : some indeterminate or unspecified thing

  2. : some indeterminate amount more than a specified number

  3. : a person or thing of consequence

  1. : in some degree : somewhat

  2. used as an intensive giving adverbial force to an adjective

under play
  1. : in or into a position below or beneath something

  2. : below or short of some quantity, level, or limit

  3. : in or into a condition of subjection, subordination, or unconsciousness

  1. : below or beneath so as to be overhung, surmounted, covered, protected, or concealed by

  2. : subject to the authority, control, guidance, or instruction of

  3. : receiving or undergoing the action or effect of

  1. : lying or placed below, beneath, or on the ventral side

  2. : facing or protruding downward

  3. : lower in rank or authority : subordinate

hat play
  1. : a covering for the head usually having a shaped crown and brim

  2. : a distinctive head covering worn as a symbol of office

  3. : an office, position, or role assumed by or as if by the wearing of a special hat

  1. : to furnish or provide with a hat

  2. : to make or supply hats


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