CATCHWEIGHT

Adverb

catchweight (not comparable)

(horse racing) Without any weight restrictions; without being handicapped.

Adjective

catchweight (not comparable)

(sports) Without any weight restrictions; having no handicap.

Having no standard weight, but rather having weight determined when packaged for sale or shipping.

Noun

catchweight (countable and uncountable, plural catchweights)

(sports) A weight category other than the standard weight categories: either an agreed-upon weight range or an agreement to allow any weight.

The weight of an item that is not set to a standard, but which varies around an approximate value.

The weight of all the fish caught.

Source: Wiktionary

Catch"weight`, adv. (Horseracing)

Definition: Without any additional weight; without being handicapped; as, to ride catchweight.

Source: Webster’s Unabridged Dictionary 1913 Edition