Definition of "chameleon" in English

noun

1. A small to mid-size reptile, of the family Chamaeleonidae, and one of the best known lizard families able to change color and project its long tongue.

2. (figurative) A person with inconstant behavior; one able to quickly adjust to new circumstances.

3. (physics) A hypothetical scalar particle with a non-linear self-interaction, giving it an effective mass that depends on its environment: the presence of other fields.

adjective

1. That changes or modifies its color.

   • The wall was covered with a chameleon paint.