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.
Brag(verb) to talk about one's self, or things pertaining to one's self, in a manner intended to excite admiration, envy, or wonder; to talk boastfully; to boast; -- often followed by of; as, to brag of one's exploits, courage, or money, or of the great things one intends to do.