What is the meaning of contribute?

verb

• Bestow a quality on.
  • usage: "Her presence lends a certain cachet to the company"; "The music added a lot to the play"; "She brings a special atmosphere to our meetings"; "This adds a light note to the program"
  • synonyms: lend, impart, bestow, add, bring
• Contribute to some cause.
  • usage: "I gave at the office"
  • synonyms: give, chip in, kick in
• Be conducive to.
  • usage: "The use of computers in the classroom lead to better writing"
  • synonyms: lead, conduce
• Provide.
  • usage: "The city has to put up half the required amount"
  • synonyms: put up