Definition of lugubrious adjective from the Oxford Advanced Learner's Dictionary

 

lugubrious

 adjective
adjective
BrE BrE//ləˈɡuːbriəs//
 
; NAmE NAmE//ləˈɡuːbriəs//
 
Unhappiness
 
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sad and serious synonym doleful a lugubrious expression See related entries: Unhappiness Word Origin early 17th cent.: from Latin lugubris (from lugere ‘mourn’) + -ous.
See the Oxford Advanced American Dictionary entry: lugubrious