/ ˈfʌsti; NAmE / adjective ( disapproving )
1.
smelling old, damp or not fresh
SYN musty :
a dark fusty room
2.
old-fashioned :
fusty ideas
a fusty old professor
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WORD ORIGIN
late 15th cent.: from Old French fuste smelling of the cask, from fust cask, tree trunk, from Latin fustis cudgel.