Noun

1. A business where movies are projected onto a huge outdoor screen, and patrons remain in their vehicles, listening either by a speaker or a designated radio frequency.
2. A restaurant where patrons remain in their vehicles and order food and beverages via a speaker phone; their meal is brought to their vehicle by a waitress.

   The teen-agers went down to the drive-in to order some hamburgers and fries.

3. Shortened form of drive-in movie or drive-in restaurant.