Mon"o*gram (?), n. [L. monogramma; Gr. mo`nos single + gra`mma letter, fr. gra`fein to write: cf. F. monogramme. See Graphic.] 1. A character or cipher composed of two or more letters interwoven or combined so as to represent a name, or a part of it (usually the initials). Monograms are often used on seals, ornamental pins, rings, buttons, and by painters, engravers, etc., to distinguish their works.

Monogram.

&fist; The monogram above, combining the letters of the name Karolvs, was used by Charlemagne.

2. A picture in lines; a sketch. [R.]

3. An arbitrary sign for a word. [R.]

• A design composed of one or more letters, often intertwined, used as an identifying mark of an individual or institution
  
• To mark something with a monogram