Word.ws English Dictionary

negative lookaheads

negative lookaheads is the plural of negative lookahead.

Meaning of negative lookahead

Noun

negative lookahead (countable and uncountable, plural negative lookaheads)

  1. (regular expressions) The analysis of the subsequent characters absence before the regular expression is matched (symbol: ?!).
    • Negative lookahead works just like positive lookahead, except that whereas positive lookahead matches when the regex inside the lookahead matches, negative lookahead matches when the regex inside the lookahead failed to match.2012 August, Jan Goyvaerts, Steven Levithan, Regular Expressions Cookbook

Questions about negative lookaheads

What is negative lookaheads the plural of?
Negative lookaheads is the plural of negative lookahead.

Words near negative lookaheads in the dictionary

  1. negative income taxes
  2. negative indexing
  3. negative interest
  4. negative logic
  5. negative lookahead
  6. negative lookaheads
  7. negative lookaround
  8. negative lookbehind
  9. negative lookbehinds
  10. negative nancies
  11. negative nancy

Source and license

Adapted from Wiktionary: negative lookaheads (page history and authors); negative lookahead (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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