one of the letters ‘I’, ‘V’, ‘X’, ‘L’, ‘C’, ‘D’, and ‘M’, used by the ancient Romans to represent numbers and still sometimes used, for example on clocks
Synonyms and related words
Roman numerals
C
D
i
Roman numeral
noun countable
US
Word Forms
singular
Roman numeral
plural
Roman numerals
DEFINITIONS1
1
one of the letters “I,” “V,” “X,” “L,” “C,” “D,” and “M,” used by the ancient Romans to represent numbers and still sometimes used, for example on clocks