noun
advertising sent directly to prospective customers via the mail
• Hypernyms: ↑ad, ↑advertisement, ↑advertizement, ↑advertising, ↑advertizing, ↑advert
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noun [noncount]
: papers containing advertisements that are mailed directly to people's homes
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advertisements that are sent to people through the post/mail
•
a direct mail campaign aimed at US small businesses
Useful english dictionary. 2012.