ifdef
noun
ifdef is spelled I-F-D-E-F: 5 letters. It appears about once in every 93 million words in written English, the 309,272nd most frequent word form (wordfreq, 2021 data). As a noun, 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” (English Wiktionary, September 2026). The plural of ifdef is ifdefs.
How many letters and syllables are in ifdef?
| Letters | 5: I-F-D-E-F |
|---|---|
| In writing | about once in every 93 million words; the 309,272nd most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is ifdef?
Ifdef appears about once in every 93 million words in written English, the 309,272nd most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Forms of ifdef
- ifdefs plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does ifdef mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 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.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Where does ifdef come from?
A keyword in various programming languages, short for if defined.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).