Definition of cosmic for English Language Learners. : 1  of or relating to the universe or outer space. : 2  relating to spiritual matters. : 3  very large or important.
Definition of boast. 1 : a statement expressing excessive pride in oneself : the act or an instance of boasting (see 2boast) : brag It may sound like a boast, but I truly am very wealthy.
Definition of BOAST for Kids. 1. : an act of expressing too much pride in a person's own qualities, possessions, or achievements. 2. : a cause for pride. â boastÂ·ful \ËbÅst-fÉl\ adjective.