1. [ adjective ] experiencing or marked by or causing sadness or sorrow or discontent
Synonyms: sad

"unhappy over her departure" "unhappy with her raise" "after the argument they lapsed into an unhappy silence" "had an unhappy time at school" "the unhappy (or sad) news"

Related terms: happy bad miserable homesick lovesick sad sorrowful dysphoric discontented dejected infelicitous joyless cheerless happiness happiness
2. [ adjective ] generalized feeling of distress
Synonyms: distressed dysphoric
Related terms: euphoric dejected
3. [ adjective ] causing discomfort

"the unhappy truth"

Related terms: unpleasant
4. [ adjective ] marked by or producing unhappiness
Synonyms: infelicitous

"infelicitous circumstances" "unhappy caravans, straggling afoot through swamps and canebrakes"- American Guide Series

Related terms: unfortunate