( ( ( The weight ) ( of ( an object ) ) ) ( ( is ( ( ( ( ( a measure ) ( of ( ( the force ) ( ( exerted ( on ( the object ) ) ) ( by gravity ) ) ) ) ) , ) or ) ( ( the force ) ( needed ( to ( support it ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN weight)) (PP (IN of) (NP (DT an) (NN object)))) (VP (VBZ is) (NP (NP (NP (DT a) (NN measure)) (PP (IN of) (NP (NP (DT the) (NN force)) (VP (VBN exerted) (PP (IN on) (NP (DT the) (NN object))) (PP (IN by) (NP (NN gravity))))))) (, ,) (CC or) (NP (NP (DT the) (NN force)) (VP (VBN needed) (S (VP (TO to) (VP (VB support) (NP (PRP it))))))))) (. .)))
The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it.
(ROOT (S (NP (NNP Weight)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT the) (NN measure)) (PP (IN of) (NP (NP (DT the) (NN force)) (PP (IN of) (NP (NP (NN gravity)) (VP (VBG pulling) (PRT (RP down)) (PP (IN on) (NP (DT an) (NN object)))))))))))) (. .)))