tr.v., -vad·ed, -vad·ing, -vades.
To be present throughout; permeate. See synonyms at charge.
[Latin pervādere : per-, through; see per- + vādere, to go.]
pervader per·vad'er n.pervasion per·va'sion (-vā'zhən) n.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.