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.
Wiktionary(0.00 / 0 votes)Rate this definition: brag(Noun) A boast, a loud appraisal of oneself. brag(Noun) The card game three card brag. brag(Verb) To boast; to talk with excessive pride about what one has, can do, or has done.