To use something as the foundation or grounds for something else (formal variant of 'base on').
To build or create something using another thing as your main source or reason — the more formal way of saying 'base on'.
2 meanings, ordered from most common to least. Color-coded by CEFR level.
To use evidence, facts, or principles as the formal basis for an argument, decision, or work.
"The court's ruling was based upon the constitutional rights of the individual."
We hold these truths to be self-evident, that all men are created equal — a proposition based upon which this nation was founded.
To use a specific source as the foundation for a creative or academic work.
"This theory is based upon decades of clinical research."
Transparent — 'upon' is simply the formal version of 'on'.
To build or create something using another thing as your main source or reason — the more formal way of saying 'base on'.
'Base upon' is interchangeable with 'base on' but is preferred in formal, academic, and legal writing. Rarely heard in everyday conversation. 'Upon' adds a more elevated, serious tone.
Natural word combinations native speakers use most often.
The five tense forms you'll use most often.
Listen to native speakers using "base upon" in real YouTube videos — click a clip to watch it on Looplines.
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