Abe /eɪb/noun 1forms 1phrases 1 noun1 •(US, slang) A five-dollar bill."Gambling's not my form of masochism," said Carl. "Huh?" "So how much?" "The wad's mostly ones. Some Jeffersons. Two or three Abes." — 1996 formsAbes Phrases with Abe Honest AbeA forthright and honest person.