say it: WIS-uhl
whistle is a verb and noun meaning "make whistling sounds". It carries 11 recorded senses.
a small wind instrument that produces a whistling sound by blowing into it
acoustic device that forces air or steam against an edge or into a cavity and so produces a loud shrill sound
an inexpensive fipple flute
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 whistle 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.