Moving heavily, clumsily, or noisily.
The work or business of cutting down trees and preparing lumber.
The definition of lumbering is a heavy or clumsy movement.
An example of lumbering is an elephant climbing a muddy hill; a lumbering elephant.
Lumbering is defined as cutting down trees and turning them into pieces of wood used for building.
An example of lumbering is using a chain saw to cut down trees which will eventually be made into 2x4s.