verb
1.
to give in common with others
contribute to a fund for handicapped children
Synonyms: chip in, come through, kick in, pitch in, subscribe; compare give 1
Idioms: put something in the pot, sweeten the kitty
2.
to have a share in something (as an act or effect)
careful planning contributed greatly to the success of the project
Synonyms: conduce, redound, tend
Related Word: aid, help, assist; add (to), augment, supplement; fortify, recruit, reinforce, strengthen
Idioms: do one's bit, have a hand in
Contrasted words: detract, minus, subtract, take away