Definition on MSE of *trusted user*: "a user on MSE who has gained 20,000 reputation points". *What are trusted users?* :
Trusted users are allowed to perform trusted actions, including:
Voting to delete answers with score of -1 or lower
Voting to undelete answers except those deleted by a moderator
Voting to delete questions with a score of -3 or lower immediately after they are closed
Editing tag wikis without needing approval