allo UK /ˈæ.ləʊ/US /ˈæ.loʊ/adjective 1noun 1forms 3 adjective1 •(informal) Allosexual and/or alloromantic; experiencing sexual and/or romantic attraction.Asking a person to work on themself to have more sex seems natural and intuitive, but imagine asking the allo partner to be celibate. — 2020 noun1 •(informal) One who is allosexual and/or alloromantic.Then maybe asexuals wouldn't face negative responses ("You're a late bloomer" or You haven't met the right person" etc.) when they come out to allos. — 2021 formsallos · more allo · most allo