Definition of frowsty in US English:

frowsty

adjectivefrowstiest, frowstier

British
  • Having a stale, warm, and stuffy atmosphere.

    ‘a small, frowsty office’
    • ‘For, though I've no idea what this accoutred frowsty barn is worth, it pleases me to stand in silence here.’
    • ‘Yet, only a year ago, the conventional wisdom was that the Golden Jubilee was likely to be a frowsty and embarrassingly ill-attended affair.’
    • ‘Its roughcast walls are pitted; it has an air of frowsty, shut-up dereliction.’
    • ‘In these frowsty surrounding, that is positively searing.’
    • ‘Here we are back in the pestilent purlieus of Walham Green, and the frowsty atmosphere of the frowsy ‘medium’ and the squalid séance.’
    stuffy, musty, airless, unventilated, fusty, close, muggy, stifling, suffocating, oppressive
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Origin

Mid 19th century (originally dialect): variant of frowzy.

Pronunciation

frowsty

/ˈfroustē//ˈfraʊsti/