A 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.
An adult male kangaroo.
(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.
Something that makes a booming sound.
(mainly 1920–1930) A transient worker who would move from boom town to boom town in search of temporary work.
A device used to bind or tighten chain.
A nuclear ballistic missile submarine, SSBN.
A bittern (subfamily Botaurinae).
A red squirrel (Tamiasciurus hudsonicus).
A mountain beaver (Aplodontia rufa).