Though words are arbitrary in their primitive institution, yet when once their signification is fixed, we are no more entitled to alter it than to call a tree an elephant; for, being no man's private possession, but the common measures of commerce and communication, it is not for any one at pleasure to change the stamp they are current in; at least where there is a necessity to do so, notice of it should be given.
Richard Kirwan, Logick; Or, an Essay on the Elements, Principles, and Different Modes of Reasoning, Volume 1
definitions, respect, words