CMXVIII

CMXVIII is a Roman numeral representing the number 918. It is formed by the parts CM (900) plus XV (15) plus III (3). The prefix CM uses subtractive notation, where C placed before M indicates 100 less than 1000, a common convention in classical Roman numerals.

In practice, CMXVIII can designate a year, a position in a sequence, or a catalog designation. When used as a year, it denotes 918 CE (or AD), depending on dating conventions. In inscriptions, lists, or titles, CMXVIII may appear together with other numerals to indicate order or volume. In modern writing, its meaning is determined by the surrounding context, since the same string can occur in non-date roles.

Historically, 918 falls within the early medieval period, a time of fragmented political authority across Europe and the wider Eurasian world. The numeral CMXVIII itself is notable mainly as an example of standard Roman numeral syntax rather than for a specific historical event associated with that exact year.

CMXVIII is part of the larger system of Roman numerals, which continues to be used in some contexts for dates, outlines, clocks, and other decorative or formal applications. It illustrates how subtractive notation (such as CM) and additive parts (XV, III) combine to form larger numbers in classical notation.