1. to make plural or express in the plural form
Usage: British spelling; American English uses 'pluralize'
2. to increase in number or variety; to make more diverse or widespread
Usage: less common; often used in academic or formal contexts

Examples

• In English, you pluralise most nouns by adding an 's' or 'es'.
• The word 'child' pluralises to 'children'.
• Modern society tends to pluralise viewpoints and perspectives.
• The curriculum aims to pluralise learning methods across different subjects.
• Some irregular verbs pluralise their forms in unexpected ways.