<p><strong>Noun</strong></p><ul><li>(plural: bases) the bottom or base of anything; the part on which something stands or rests</li><li>anything upon which something is based; fundamental principle; groundwork</li><li>the principal constituent; fundamental ingredient</li><li>a basic fact, amount, standard, etc., used in making computations, reaching conclusions, or the like: The nurse is paid on an hourly basis. He was chosen on the basis of his college grades.</li><li>Mathematics: a set of linearly independent elements of a given vector space having the property that every element of the space can be written as a linear combination of the elements of the set.</li></ul>