Definition of "deadwood"

Dead branches or wood on a tree, or coarse woody debris.  examples

People or things judged to be superfluous to an organization or project.  examples

Money not realized by exiting a winning pump trade too early.  examples

(bowling) Pins that have fallen and have not been cleared from the alley.  examples

(nautical) Vertical planks between the keel and the sternpost that act as reinforcement.  examples

(by extension) Structural material on a load-carrying vehicle that reduces the available cargo space.  quotations  examples

(rummy) Cards in a hand that do not contribute to sets and which are usually counted as points against the player holding the hand.  examples

(poker) Cards that have been discarded.  examples