mourning

mourning /ˈmoɚnɪŋ/ noun
mourning
/ˈmoɚnɪŋ/
noun
Britannica Dictionary definition of MOURNING
[noncount]
1 
: the act of mourning for someone who has died
2 
: great sadness felt because someone has died
3 
: black clothing that is worn to show that you are mourning for someone who has died