Definition of "ad" in English

noun

1. Abbreviation of advertisement.

   • I have placed both of the ads in the newspaper as instructed.

2. Abbreviation of advertising.

3. Abbreviation of advertiser.

noun

1. (tennis) Advantage; also, designating the left-hand side, from the player's point of view, of their half of the court, where the advantage point following a deuce is always played.

2. (debating) advantage

   • ads and disads

preposition

1. to, toward