ifdef

Fetched 2026-10-26 (cache).

Synonyms: indef, idef

Antonyms: indef, idef

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{lb|en|computing|programming}} 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: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.