• BH3 interacting domain death agonist (biochemistry)
• Bidding, making a price offer in an auction, stock exchange, or card games.
• Bid price, a price offered for a good by a potential buyer
• Bid, a formal invitation to join a fraternity or sorority
• Beed, a town in Maharashtra, India is sometimes referred to as Bid.
• Bid, lead singer and songwriter of the band, The Monochrome Set
• Jay Bid, Senior Vice President at NERA Economic Consulting and author of the book "Materiality, Causation, and Damages: Experiences from the Courtroom".

BID can stand for one of the following:

• Binary Integer Division
• Body Image Disorder
• Business improvement district
• Bridge Identification
• British Industrial Developments
• Block Island State Airport (IATA Code: BID)
• bis in die, Latin for "twice daily"; usually refers to medication dosage.