noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A group of eight things.
2. 2
   the cardinal number that is the sum of seven and one wordnet
3. 3
   hundred million = myriad myriad; 100,000,000 = 10⁸ historical

Synonyms

All synonyms

octonary8achtbeinatomeighteight

Etymology

From oct- + -ad.

Related phrases

octad of octads

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.