bumper Meaning, Definition & Usage

  1. noun a glass filled to the brim (especially as a toast)
    • we quaffed a bumper of ale
  2. noun a mechanical device consisting of bars at either end of a vehicle to absorb shock and prevent serious damage

WordNet

Bum"per noun
Etymology
A corruption of bumbard, bombard, a large drinking vessel.
Definitions
  1. A cup or glass filled to the brim, or till the liquor runs over, particularly in drinking a health or toast.
    He frothed his bumpers to the brim. Tennyson.
  2. A covered house at a theater, etc., in honor of some favorite performer. Cant
Bump"er noun
Definitions
  1. That which bumps or causes a bump.
  2. Anything which resists or deadens a bump or shock; a buffer.

Webster 1913