say it: AHY-buhs
ibis is a noun meaning "wading birds of warm regions having long slender down-curved bills". It carries one recorded sense.
wading birds of warm regions having long slender down-curved bills
Forms marked are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for ibis come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.