(boxing) a boxer weighing more than a lightweight boxer and less than a middleweight boxer; someone boxing in the welterweight class

(bodybuilding) A high-calorie beverage or powdered drink used to bulk up the physique, especially the muscles. Typically, such beverages are very high in sugar content, and need to be drunk in large volumes.

The total weight of a vehicle and its freight, fuel, passengers etc. / The total weight of a product and its packaging.

plural of welter-weight

The weight of a product (especially food) without the weight of its packaging. / The weight of a vehicle without that of its fuel, cargo, personnel etc.

(slang) A cyclist who is concerned about the weight of his or her bicycle.

Alternative spelling of molecular weight

(Britain) An allowance paid to staff of a national organization working in London to help offset the additional expense of living in the capital.

Increase in weight, usually of a person or animal.

(sciences) A measure or unit to express an object's weight, which is directly proportional to its mass when the gravity is fixed (as commonly but imprecisely presumed on earth's surface.)