/ Thesaurus / A Synonyms of active transport Find synonyms for: Noun1. active transport, transportusage: transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energyWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language