not know the first thing about

idiom
Updated on: 15 Nov 2017

Definition of not know the first thing about

: to have little or no knowledge about (something or someone)
  • I don't know the first thing about children.

Word by Word Definitions

know play
  1. : to perceive directly : have direct cognition of

  2. : to have understanding of

  3. : to recognize the nature of : discern

  1. : knowledge

first play
  1. : preceding all others in time, order, or importance: such as

  2. : earliest

  3. : being the lowest forward gear or speed of a motor vehicle

  1. : before another in time, space, or importance

  2. : in the first place

  3. : for the first time

  1. : one that is number one in a series — see Table of Numbers

  2. : something that is first: such as

  3. : the first occurrence or item of a kind

thing play
  1. : an object or entity not precisely designated or capable of being designated

  2. : an inanimate object distinguished from a living being

  3. : a separate and distinct individual quality, fact, idea, or usually entity


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