mon ‧ o ‧ gram /ˈmɒnəɡræm $ ˈmɑː-/ BrE AmE noun [countable]
[ Date: 1600-1700 ; Language: Late Latin ; Origin: monogramma , from Greek mono- ( ⇨ ↑ mono- ) + gramma 'letter' ]
a design that is made using the first letters of someone’s names and is put on pieces of clothing or other possessions
—monogrammed adjective