1. downdrift - Noun
2. downdrift - Adverb
English Wikipedia has an article on:downdriftWikipedia
downdrift (plural downdrifts)
(phonetics) A lowering (over time) of the pitch of the tones of a tonal language.
downdrift (not comparable)
On the downward side of a drift.
A groyne promotes the build-up of sediment on its updrift side, and reduces erosion on the downdrift side.