know better

Be able to recognize something as wrong or not possible, as in Mary should know better than to leave her child alone in the house, or Try to get in without a ticket? You know better than that. [c. 1700]


Nearby words

  1. knout,
  2. know,
  3. know a thing or two,
  4. know all the answers,
  5. know beans,
  6. know by heart,
  7. know by sight,
  8. know enough to come in out of the rain,
  9. know from adam,
  10. know if one is coming or going

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.