Noun
a state of mild depression
Source: WordNetIf you were music, I would listen to you ceaselessly, and my low spirits would brighten up. Anna Akhmatova
He suffered ulcerous sores in his mouth, pain troubled his stomach and intestines, and he struggled with increasingly low spirits. Source: Internet
Later, Dr. McCoy joins Kirk on his birthday; seeing Kirk in low spirits, the doctor advises Kirk to get a new command and not grow old behind a desk. Source: Internet
"The high and low spirits of Transeurasian language studies" in Johanson and Robbeets (2010), 7–20. Source: Internet