numeration

UK: /ˌnjuːməˈreɪʃən/ US: (no̅o̅′mə rā′shən, nyo̅o̅′-)

WordReference Random House Unabridged Dictionary of American English © 2026

nu•mer•a•tion  (no̅o̅′mə rā′shən, nyo̅o̅′-), n. 

1. Mathematics an act or instance of or the process or result of numbering or counting.
2. Mathematics the process or a method of reckoning or calculating.
3. Mathematics the act, art, or method of expressing or reading off numbers set down in numerals, esp. those written decimally.

• Latin numerātiōn- (stem of numerātiō) a counting out, paying, equivalent. to numerāt(us) numerate + -iōn- -ion
• late Middle English 1400–50

nu′mer•a′tive, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::

numeration / ˌnjuːməˈreɪʃən/ noun

1. the act or process of writing, reading, or naming numbers
2. a system of numbering or counting

ˈnumerative adjective