Definition of "monogram"

monogram¹

/ˈmɒ.nəˌɡɹæm/

noun
plural monograms
1. A design or motif composed of one or more letters, often intertwined, used as an identifying mark of an individual or institution; the letters are usually the initials of their names.
  Quotations
  It dates from 1909-1911, when the then District Railway (its DR monogram is on one of the roundels in the fine plasterwork) rebuilt its Victoria station.
  2021 December 15, Robin Leleux, “Awards honour the best restoration projects: The Great Western Railway Craft Skills Award: Victoria Arcade”, in RAIL, number 946, page 59
verb
third-person singular simple present monograms, present participle monogramming or monograming, simple past and past participle monogrammed or monogramed
1. (transitive) To mark something with a monogram.