From Longman Dictionary of Contemporary Englishbuild on phrasal verb1 build something on something to base something on an idea or thing Our relationship is built on trust.2 build on somethingINCREASE IN NUMBER OR AMOUNT to use your achievements as a base for further development The new plan will build on the success of the previous programme.3 BUILDTBCto add another room to a building in order to have more spacebuild something ↔ on We’re planning to build on a conservatory. → build→ See Verb table
