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 waiter. 1  1 : one that waits on another; especially : a person who waits tables (as in a restaurant) 2  2 : a tray on which something (such as a tea service) is carried : salver.