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.
A flat surface, as of a panel or of a fence, on which bills are posted; a bulletin board.
Kids need to remember that when you put something on Twitter, it's not like whispering to your friend, you've put it on a billboard that the whole world, including your own kids someday, can see. Bill Cosby
Getting over someone is a grieving process. You mourn the loss of the relationship, and that's only expedited by 'Out of sight, out of mind.' But when you walk outside and see them on a billboard or on TV or on the cover of a magazine, it reopens the wound. It's a high-class problem, but it's real. Hank Azaria