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.
boastâ²ingâ¢ly, adv. syn: boast, brag imply vocal self-praise or claims to superiority over others. boast usu. refers to a particular ability, possession, etc., that may justify a good deal of pride: He boasts of his ability as a singer. brag, a more informal term, usu.