From Longman Dictionary of Contemporary Englishldoce_180_akettleket‧tle /ˈketl/ ●●● S3 noun [countable] 1 
DFUa container with a lid, a handle, and a spout, used for boiling and pouring water SYN teakettle American English She filled the kettle and switched it on. The kettle’s boiling (=the water in it is boiling). Put the kettle on (=start boiling water in a kettle), will you?2 American English a large pot, used for making soup3 → another/a different kettle of fishOrigin kettle Old English cetel
DFUa container with a lid, a handle, and a spout, used for boiling and pouring water SYN teakettle American English She filled the kettle and switched it on. The kettle’s boiling (=the water in it is boiling). Put the kettle on (=start boiling water in a kettle), will you?2 American English a large pot, used for making soup3 → another/a different kettle of fishOrigin kettle Old English cetel 