Definition of "billboard" in English

noun

1. A very large outdoor sign, generally used for advertising.

2. (dated) A flat surface, such as a panel or fence, on which bills are posted; a bulletin board.

3. (nautical) A piece of thick plank, armed with iron plates, and fixed on the bow or fore-channels of a vessel, for the bill or fluke of the anchor to rest on.

4. (television, radio) An opening or closing portion of a program, often including credits and sponsors' names.

5. (computer graphics) A sprite that always faces the screen, no matter which direction it is viewed from.

verb

1. (transitive) To advertise on a billboard.

   • The upcoming concert was billboarded all over the city.