multigrade - meaning and definition. What is multigrade
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What (who) is multigrade - definition

Plural quantifier; Multigrade predicate; Plural logic; Multigrade relation; Plural reference; Variably polyadic predicate; Variably polyadic relation; Anadic predicate; Anadic relation

multigrade      
¦ noun
1. an engine oil that meets the requirements of several standard grades.
2. (trademark in the US) a kind of photographic paper made with two emulsions of different sensitivities, from which prints with different levels of contrast can be made.
Plural quantification         
In mathematics and logic, plural quantification is the theory that an individual variable x may take on plural, as well as singular, values. As well as substituting individual objects such as Alice, the number 1, the tallest building in London etc.

Wikipedia

Plural quantification

In mathematics and logic, plural quantification is the theory that an individual variable x may take on plural, as well as singular, values. As well as substituting individual objects such as Alice, the number 1, the tallest building in London etc. for x, we may substitute both Alice and Bob, or all the numbers between 0 and 10, or all the buildings in London over 20 stories.

The point of the theory is to give first-order logic the power of set theory, but without any "existential commitment" to such objects as sets. The classic expositions are Boolos 1984 and Lewis 1991.

Examples of use of multigrade
1. A statement from the company said this new generation synthetic multigrade engine oil meets the latest API SL/CF and ACEA – A3/B3 International specifications.