opt-in

短语

发音

其它
US

释义与例句

adj.
  1. 1.

    The property of having to choose explicitly to join or permit something; a decision having the default option being exclusion or avoidance; used particularly with regard to mailing lists and advertising.

    They set up an opt-in mailing list, so that those who wanted the notices could subscribe.

词源

From opt + in.

来源：wiktionary