noun
cornerstone
CEFR B2
the fundamental assumptions from which something is begun or developed or calculated or explained
In a sentence
Six example sentences with cornerstone, each labelled with its topic.
Comparative advantage remains the cornerstone of trade theory, and every later model is built on top of it.
Economics
Doubt about the senses is the cornerstone of his method, since nothing else survives the first evening of questioning.
Philosophy
Weekly customer calls became the cornerstone of the company, and no roadmap decision was made without them.
Startups
The presumption of innocence is the cornerstone of the system, and every rule of evidence is arranged to protect it.
Law
Conservation of energy is a cornerstone of physics, and any experiment that seems to break it gets checked for leaks first.
Science
Public key exchange became the cornerstone of online security, and every secure website still rests on the idea.
Technology
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