What does the word assert mean?

Usage examples for assert

  1. " They were so, sir," returned the critic; " we make it a rule in our profession to assert that fact." – Paul Clifford, Volume 1. by Edward Bulwer-Lytton
  2. It is my business to assert it. – The Expositor's Bible: Colossians and Philemon by Alexander Maclaren
  3. It was designed to be a call to the people to rise and assert their liberty. – The Student-Life of Germany by William Howitt