Rare ·Advanced level

Definitions

Noun

1. 1
   the cardinal number that is the sum of seventeen and one wordnet

Adjective

1. 1
   being one more than seventeen wordnet

Synonyms

All synonyms

1818eighteeneighteeneighteeneighteenth

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