ad

ad¹

/ad/, n.

1. advertisement.

2. advertising: an ad agency.

[1835-45; by shortening]

ad²

/ad/, n. Tennis.

1. advantage (def. 5).

2. ad in, the advantage being scored by the server.

3. ad out, the advantage being scored by the receiver.

[1945-50; by shortening]

ad³

/ad/, prep.

(in prescriptions) to; up to.

[ < L]

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