Definitions
1.nounA person born in the postwar years (generally considered in the United States and other Allied countries as between 1946 and the early 1960s), when there was a marked increase in birthrates throughout the Western world following the return of servicemen at the end of World War II.
2.nounAn adult male kangaroo.
3.noun(by extension) A person who does not know how to utilize new technologies well."I'm such a boomer; I have no idea how to use this phone."
4.nounSomething that makes a booming sound.
5.noun(mainly 1920–1930) A transient worker who would move from boom town to boom town in search of temporary work.
6.nounA device used to bind or tighten chain.
7.nounA nuclear ballistic missile submarine, SSBN.
8.nounA bittern (subfamily Botaurinae).
9.nounA red squirrel (Tamiasciurus hudsonicus).
10.nounA mountain beaver (Aplodontia rufa).