noun, verb ·Rare ·Advanced level

Definitions

Noun

1. 1
   A list, resembling a blacklist, for less serious offences.
2. 2
   A technique for blocking spam (junk e-mail) by temporarily rejecting mail from unknown senders. A legitimate sender is likely to try sending again after a delay. Internet

Verb

1. 1
   To place on a greylist. transitive

Antonyms

All antonyms

blacklist

Etymology

From grey + list.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.