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at

preposition (EMAIL ADDRESS)
 
 
weak /ət/ strong /æt/

Definition

A1 the @ symbol that joins the name of a person or a department in an organization to a domain name to make an email address: "What's your email address?" "It's dictionary at cambridge dot org."Conventions used on the Internet and in email
(Definition of at preposition (EMAIL ADDRESS) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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