Definition of tumescent in US English:

tumescent

adjective

  • 1Swollen or becoming swollen, especially as a response to sexual arousal.

    swollen, bloated, dilated, engorged, enlarged, inflated, stretched, blown up, pumped out, pumped up
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  • 2(especially of language or literary style) pompous or pretentious.

    ‘his prose is tumescent, full of orotund language’

Origin

Mid 19th century: from Latin tumescent- ‘beginning to swell’, from the verb tumescere, from tumere ‘to swell’.

Pronunciation

tumescent

/t(y)o͞oˈmes(ə)nt//t(j)uˈmɛs(ə)nt/