It's a fantastic being or fact, to be unreal. Fictional, fabulous. It only exists in the imagination. Fantasy, delirium, illusion, fiction, utopia, hallucination.
chimera-refers to the expression : cartilaginous fish, habitat in the depths of the Ocean, a close relative of sharks,
Fabulous animal of classical mythology. It was one of the many monsters begotten by Typhoon and Echidna. Its Greek name was 935; 953; 956; 945; 953; 961; 945; ( Khimaira ) and the Latin, Chimaera. The phrase " chasing a chimera " refers to look impossible ( because it is a non-existent animal ).
QUIMERA:1. FANTASY, ILLUSION, UTOPIA, ENSUENO.2. INVINCIBLE MONSTER.