noun, verb ·Rare ·Advanced level

Definitions

Noun

1. 1
   A list of e-mail addresses whose owners have agreed to receive promotional email. Internet

Verb

1. 1
   To mark (an e-mail address or a domain) as having agreed to receive promotional email. Internet, transitive

Etymology

safe + list, because the emails are "safe" from being reported as spam.

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