Other forms: billboards; billboarded; billboarding
A billboard is a giant roadside sign. You might pass several billboards on the highway advertising a car dealership, a restaurant, or anything else someone paid to have on a billboard big enough to be seen by passing cars.
When a company decides how to advertise, it may buy Internet ads, TV commercials, newspaper spreads, or billboard advertisements. A billboard is a good way for a business to catch people's attention, because it’s so big and a commuter may drive or walk past it five times a week. The word billboard first appeared in American English in the 1840s, meaning the board or wall where posters or handbills could be pasted. Billboard is also the name of a music magazine.