Word.ws English Dictionary

ifdef

ifdef noun: a construct in source code that allows another part of the code to run only if a specified identifier is defined in the program.

Noun

ifdef (plural ifdefs)

  1. A construct in source code that allows another part of the code to run only if a specified identifier is defined in the program.

Forms of ifdef

pluralifdefs

Origin of ifdef

A keyword in various programming languages, short for if defined.

Questions about ifdef

What does ifdef mean?
Ifdef means a construct in source code that allows another part of the code to run only if a specified identifier is defined in the program.
What part of speech is ifdef?
Ifdef is a noun.
What is the plural of ifdef?
The plural of ifdef is ifdefs.

Words near ifdef in the dictionary

  1. IFAs
  2. ifb
  3. IFBs
  4. IFC
  5. IFCC
  6. ifdef
  7. ifdefs
  8. IFE
  9. Ifedore
  10. ifen
  11. ifenprodil

Source and license

Adapted from Wiktionary: ifdef (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “ifdef.” Word.ws, https://word.ws/ifdef. Based on Wiktionary, CC BY-SA 4.0.