Definition of "inconstant" []

• Changing or varying, especially often and without discernible pattern or reason. (adjective)
• Fickle; faithless. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Mark Twain and Will Rogers lived off the foibles of Congressmen who they described as inconstant, untrustworthy, mendacious, venal, etc, etc."
• "I have heard him called inconstant of purpose — when he deserted, for the sake of love, the hope of sovereignty, and when he abdicated the protectorship of England, men blamed his infirmity of purpose."
• "I know, at last, what the poet meant by that expression, though the word inconstant strikes me as hardly forcible enough."