grouse /ɡɹaʊs/noun 3adjective 1verb 2forms 5 noun3 •Any of various game birds of the subfamily Tetraoninae which inhabit temperate and subarctic regions of the Northern Hemisphere; specifically, the red grouse (Lagopus scotica) native to heather moorland on the British Isles.Among fowls for the table [of King Henry VIII] are crocards, winders, runners, grows, and peions, but neither Turky or Guiney-fowl. — 1531 •(informal) A cause for complaint; a grumble. •The flesh or meat of this bird eaten as food. adjective1 •(Australia, slang) Excellent.I had a grouse day.That food was grouse. verb2 •(informal) To complain or grumble.If you're cast for fatigue by a sergeant unkind, Don't grouse like a woman, nor crack on, nor blind; Be handy and civil, and then you will find That it's beer for the young British soldier. — 1890 •To hunt or shoot grouse. formsgroused · grousing · grouses · grouser · grousest