Definition of bumper

• n. - A cup or glass filled to the brim, or till the liquor runs over, particularly in drinking a health or toast.
• n. - A covered house at a theater, etc., in honor of some favorite performer.
• n. - That which bumps or causes a bump.
• n. - Anything which resists or deadens a bump or shock; a buffer.
• n. - A cup or glass filled to the brim, or till the liquor runs over, particularly in drinking a health or toast.
• n. - A covered house at a theater, etc., in honor of some favorite performer.
• n. - That which bumps or causes a bump.
• n. - Anything which resists or deadens a bump or shock; a buffer.