Definitions from Wiktionary ( )

▸ noun:  A member of a supposed prehistoric race that lived in caves or holes, a caveman.
▸ noun:  (by extension) Anything that lives underground.
▸ noun:  (derogatory) A reclusive, reactionary or out-of-date person, especially if brutish.
▸ noun:  The Eurasian wren, Troglodytes troglodytes.
▸ noun:  (computing) A person who chooses not to keep up to date with the latest software and hardware.

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