monogram

noun

1. (obsolete)A picture drawn in line only, before the colour and/or shading is applied; an outline sketch.
2. (obsolete, rare)A sentence consisting of only one line, or an epigram consisting of only one verse, of poetry.
3. 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.

   “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.”

4. One of the symbols used in either the I Ching divination or the Taixuanjing divination:
5. One of the symbols used in either the I Ching divination or the Taixuanjing divination:
6. One of the symbols used in either the I Ching divination or the Taixuanjing divination:

verb

1. (transitive)To mark something with a monogram.