say it: AHK-tuh-puus
octopus is a noun meaning "tentacles of octopus prepared as food". It carries 2 recorded senses.
tentacles of octopus prepared as food
bottom-living cephalopod having a soft oval body with eight long tentacles
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 octopus 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.