say it: flahyz
flies is a noun meaning "(theater) the space over the stage (out of view of the audience) used to store scenery (drop curtains)". It carries one recorded sense.
(theater) the space over the stage (out of view of the audience) used to store scenery (drop curtains)
dramaturgy
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 flies 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.