Definition from Wiktionary, the free dictionary
Alternative forms 
chameleon (plural chameleons)
- 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.
- A person with inconstant behavior; one able to quickly adjust to new circumstances.
- (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.
person with inconstant behavior
chameleon (not comparable)
- chameleon in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
- chameleon in The Century Dictionary, The Century Co., New York, 1911
- ^ “chameleon” in Merriam-Webster Online Dictionary, Merriam-Webster Online.
- ^ “chameleon” in Dictionary.com Unabridged, v1.0.1, Lexico Publishing Group, 2006.
- ^ “chameleon” in MacMillan Dictionary, American edition; “chameleon” in MacMillan Dictionary, British edition.