say it: ay-vee-AY-shuhn
aviation is a noun meaning "the aggregation of a country's military aircraft". It carries 4 recorded senses.
the operation of aircraft to provide transportation
the art of operating aircraft
travel via aircraft
“air travel involves too much waiting in airports”
“if you've time to spare go by air”
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 aviation 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.