KESTREL Meaning of KESTREL in English n. any small falcon, esp. Falco tinnunculus, which hovers whilst searching for its prey. [ ME castrell, perh. f. F dial. casserelle, F créc(er)elle, perh. imit. of its cry ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012