The word '100' commonly refers to the numeral one hundred, which represents the number that comes after ninety-nine and before one hundred-one. It is used in various contexts, including counting, measurement, and grading systems, where '100' often denotes a perfect score or complete quantity.
The numeral '100' is derived from the Old English "hund" (meaning "hundred") and has roots in the Proto-Germanic "hundwult," which also relates to counting in various European languages.