What is the meaning of Limber?

Flexible, pliant, bendable.

To cause to become limber; to make flexible or pliant.

A two-wheeled vehicle to which a wheeled artillery piece or caisson may be attached for transport.

The shafts or thills of a wagon or carriage.

Gutters or conduits on each side of the keelson to allow water to pass to the pump well.

To prepare an artillery piece for transportation (i.e., to attach it to its limber.)

Source: wiktionary.org