› formal a statement or principle that is generally accepted to be true, but need not be so: It is a widely held axiom that governments should not negotiate with terrorists. › specialized science a formal statement or principle in mathematics, science, etc., from which other statements can be obtained: Euclid's axioms form the foundation of his system of geometry.

(Definition of axiom from the Cambridge Advanced Learners Dictionary & Thesaurus
© Cambridge University Press)

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October 22, 2014

We often make adjectives stronger by putting an adverb in front of them. The most common ones are very and, for a stronger meaning, extremely: He was very pleased. The ship is extremely large. However, we don’t use very or extremely for adjectives that already have a strong meaning, for example fantastic,