American Dictionary

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Definition build on in American English

build on phrasal verb

[transitive] phrasal verb
1

to build a new room or part onto the outside of a building

Example

They've had an extension built onto the side of the building.

Synonyms and related words
2

to do something in addition to what you have already achieved

Example

We need to build on the ideas we have had so far.

Synonyms and related words
Definition build on in American English