gen. adjective 1adverb 1noun 5phrases 1 adjective1 •Abbreviation of general. adverb1 •Abbreviation of generally. noun5 •Abbreviation of generation. •Abbreviation of general. •Abbreviation of gender. •Abbreviation of genitive. •Abbreviation of genus. Phrases with gen. gen upTo study in detail; to familiarize oneself with all available information.