Definition of "thru" []

• Informal Through. (preposition)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In the simplest case (A), there is no organ specialized for gas exchange; oxygen simply diffuses in thru the cell membrane and carbon dioxide diffuses out."
• "The fact of the matter is, there is a ammunition black market coming in thru Mexico including AK47 Kalashnikov."
• "Even if its been six years, I can still feel your pain thru this post."