The American Heritage® Dictionary of the English Language, 4th Edition
v. To spread through or over, as with liquid, color, or light: "The sky above the roof is suffused with deep colors” ( Eugene O'Neill). See Synonyms at charge.
v. To spread through or over something, especially as a liquid, colour or light; to perfuse.
v. To spread through or over in the manner of a liquid.
the GNU version of the Collaborative International Dictionary of English
v. To overspread, as with a fluid or tincture; to fill or cover, as with something fluid.
The Century Dictionary and Cyclopedia
To overspread, as with a fluid or tincture; fill or cover, as with something fluid: as, eyes suffused with tears.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
v. cause to spread or flush or flood through, over, or across
v. to become overspread as with a fluid, a colour, a gleam of light
Word Usage
"But there are times when he seems unable to: when his emotional reactions get the better of him, and suffuse his public rhetoric on foreign affairs and infuse his specific foreign policies."