In combinatorics, counting the number of proper subsets of a finite set is a common exercise.

Linguists debated whether the language actually had a proper article distinct from the definite and indefinite forms.

Tavastia Proper has some of Finland's most beautiful lakes and medieval churches.

Editors argued that proper articles in the style guide should always be capitalized.

When studying historical demographics, researchers often focus on China Proper rather than the outlying territories.

During the rehearsal, the director instructed the dancer to move to the proper left of the stage to keep formations consistent.

Stand on the proper right of the statue to see the inscription clearly.

In the old grammar textbook, the term noun substantive proper was used to classify names such as London and Elizabeth.

In the grammar workshop, the students analyzed the nouns substantive proper to understand capitalization rules.

The new paper constructed a properad that models both associative and coassociative operations simultaneously.