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.
: a reason to be proud: something impressive that someone or something has or has done. The museum's proudest boast is its collection of rare gems. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples. /ËboÊstfÉl/ adjective [more boastful; most boastful].