set of decorative initials: a design of one or more letters, usually the initials of a name, used to decorate or identify an object
transitive verb (past and past participlemon·o·grammed or mon·o·gramed, present participlemon·o·gram·ming or mon·o·gram·ing, 3rd person present singularmon·o·grams)
Definition:
put monogram on something: to mark or decorate something with a monogram