from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The record produced by a chronograph.
- n. An inscribed phrase in which certain letters can be read as Roman numerals indicating a specific date.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A sentence or inscription in which the capital letters, interpreted in Roman numerals, stand for a particular date if rearranged.
from the GNU version of the Collaborative International Dictionary of English
- n. An inscription in which certain numeral letters, made to appear specially conspicuous, on being added together, express a particular date or epoch,
as in the motto of a medal struck by Gustavus Adolphus in 1632: ChrIstVs DVX; ergo trIVMphVs. - the capitals of which give, when added as numerals, the sum 1632.
- n. The record or inscription made by a chronograph.
from The Century Dictionary and Cyclopedia
- n. An inscription in which a certain date or epoch is expressed by the numeral letters contained in it, each letter being counted according to its independent value, as in the motto of a medal struck by Gustavus Adolphus in 1632: “ChrIstVs DVX; ergo trIVMphVs” (C + I + V + D + V + X + I + V + M + V—that is, 100 + 1 + 5 + 500 + 5 + 10 + 1 + 5 + 1000 + 5 = 1632).
From Ancient Greek χρόνος (khronos, "time") + γράμμα (gramma, "writing"). (Wiktionary)