mono · noun, adjective1
Shortenings, ultimately from the prefix mono- (“one, single”).
mono · adjective2
Clipping of monophonic.
mono · adjective, noun3
Clipping of monoamorous.
Mono · noun, proper noun4
Uncertain. The Monache, a related ethnic group, seem to derive their name from the same common source as the Mono, as -chi occurs otherwise in the Yokutsan and Miwok languages as a relatively common suffix on tribal names.
Etymology from Wiktionary, CC BY-SA 4.0.