ENGLISH
REFERENCE

cheerio

n.
US //ˈtʃɪɹioʊ// UK //tʃˈiəɹɪˌəʊ// chee·rio Archaic Informal
Origin

From cheer and/or cheery + -o.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Last updated April 17, 2026