Definition of base on/upon
- You've based your opinion on faulty information.
- The story is based on real-life events.
- The island's economy is based on tourism.
: the lower part of a wall, pier, or column considered as a separate architectural feature
: the lower part of a complete architectural design (as of a monument)
: the bottom of something considered as its support : foundation
: to make, form, or serve as a base for
: to find a foundation or basis for : to find a base (see 1base 3a) for
: of little height
: low in place or position
: on the surface : on it
: thereafter, thereon
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