on

on

preposition

Definition of ON

1

having to do with <books on sports heroes are my favorite reading matter>

Synonyms apropos, apropos of, as far as, as for, as regards (also as respects), as to, concerning, of, on, regarding, respecting, touching, toward (or towards)

Related Words over

2

in or into contact with <don't lean on that ladder—you'll knock it over>

Synonyms on, upon

Related Words alongside, next, next to; upside