Posting N. Noun Corresp. To V. Post (but Note That Post Can Be Nouned).

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posting n.

Noun corresp. to v. post (but note that
post can be nouned). Distinguished from a `letter' or
ordinary email message by the fact that it is broadcast rather
than point-to-point. It is not clear whether messages sent to a
small mailing list are postings or email; perhaps the best dividing
line is that if you don't know the names of all the potential
recipients, it is a posting.

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