Definition of "postfix" [post•fix]

• To suffix. (verb-transitive)
• A suffix. (noun)

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.

• "Tokens must be in the order they will be evaluated - i.e. "postfix" order."
• "Call () uses the local variable 'postfix' to contain the postfix array."
• "+ (They're not officially "postfix" operators because those require the absense of whitespace, and these allow whitespace."