1. to make plural; to convert a singular word or form into its plural form
Usage: British English spelling (American English: pluralizes); third-person singular present tense
2. to increase in number or variety; to make more diverse or multiple
Usage: figurative use

Examples

• In English, adding an 's' often pluralises a noun.
• The grammar rule pluralises most regular nouns by adding a suffix.
• Modern society pluralises the definition of family structures.
• The policy pluralises opportunities for different groups.
• She pluralises the word 'child' to get 'children'.
• Technology pluralises the ways we can communicate with others.