Faithless

adj

adj ·Moderate ·High school level

Definitions

Adjective
  1. 1
    Lacking faith; lacking belief in something.

    ""You're so faithless about pills," he said, "that I'm not going to give you any.""

  2. 2
    Not believing in God, religion, or a comparable ideology.
  3. 3
    Unfaithful (said of people, towards their partners)

    "Menelaus, who fought to recover his faithless wife, has clearly rooted himself in Sparta for the remainder of his life […]"

  4. 4
    Not observant of promises or covenants.
  5. 5
    Not true to allegiance, duty, or vows
Show 1 more definition
  1. 6
    Serving to disappoint or deceive
Adjective
  1. 1
    having the character of, or characteristic of, a traitor wordnet

Example

More examples

"Therefore, putting on one side imaginary things concerning a prince, and discussing those which are real, I say that all men when they are spoken of, and chiefly princes for being more highly placed, are remarkable for some of those qualities which bring them either blame or praise; and thus it is that one is reputed liberal, another miserly, using a Tuscan term (because an avaricious person in our language is still he who desires to possess by robbery, whilst we call one miserly who deprives himself too much of the use of his own); one is reputed generous, one rapacious; one cruel, one compassionate; one faithless, another faithful; one effeminate and cowardly, another bold and brave; one affable, another haughty; one lascivious, another chaste; one sincere, another cunning; one hard, another easy; one grave, another frivolous; one religious, another unbelieving, and the like."

Etymology

From Middle English feithles, equivalent to faith + -less.

Related phrases

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.