Definition of Roman numeral noun from the Oxford Advanced Learner's Dictionary

 

Roman numeral

 noun
noun
BrE
 
; NAmE
 
 
jump to other results
one of the letters used by the ancient Romans to represent numbers and still used today, in some situations. In this system I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1 000 and these letters are used in combinations to form other numbers. Henry VIII © BBC MMIX (2009) If further sub-divisions are required, small Roman numerals can be used. compare Arabic numeral
See the Oxford Advanced American Dictionary entry: Roman numeral