Idiom Definition:
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"to feel blue"
to feel sad
Synonyms:
bereaved, cheerless, dejected, depressed, despairing, despondent, disconsolate, dismal, distressed, doleful, down, downcast, forlorn, gloomy, glum, grief-stricken, heartbroken, heartsick, heavyhearted, hurting, doldrums, languishing, low, low-spirited, lugubrious, melancholy, morbid, morose, mournful, pensive, pessimistic, somber, sorrowful, sorry, troubled, weeping, wistful, woebegone
This poor fellow is both literally and idiomatically
feeling blue. - - - - ->