Quantifier (noun)

1. A word or symbol that indicates the quantity of something, such as 'some' or 'all' in mathematical logic and linguistics.
2. A device or system that measures the amount of something.
3. An expression that refers to the quantity of a variable in mathematical logic and linguistics.

Origin:

Late 19th century: from quantify + -er.

Examples:

1. In mathematical logic, quantifiers are used to express the number of elements in a set.
2. The quantifier in this sentence is 'all', referring to every member of the set.
3. The use of quantifiers allows for more precise statements in mathematical logic and linguistics.
4. A quantifier is a fundamental concept in mathematical logic and set theory.
5. Quantifiers are used to specify the scope and extent of a logical statement.