WordReference Random House Unabridged Dictionary of American English © 2025
sub•duc•tion
(səb duk′shən),USA pronunciation n.
- an act or instance of subducting;
subtraction or withdrawal. - Geologythe process by which collision of the earth's crustal plates results in one plate's being drawn down or overridden by another, localized along the juncture (subduc′tion zone′) of two plates.
- Latin subductiōn-, stem of subductiō pulling up, computation; see subduct, -ion
- 1570–80
'subduction' also found in these entries (note: many are not synonyms or translations):