What does the word omission mean?

Usage examples for omission

  1. Permit me to supply your omission, and to tell you why your law is so intensely odious. – A Letter to the Hon. Samuel Eliot, Representative in Congress From the City of Boston, In Reply to His Apology For Voting For the Fugitive Slave Bill. by Hancock
  2. No one but Wade noticed this omission of courtesy. – The Mysterious Rider by Zane Grey
  3. Consequently, if he had not alluded to his former religious life during the sittings, the omission might have caused a grave doubt of his identity. – Mrs. Piper & the Society for Psychical Research by Michael Sage