1. to concentrate too narrowly on a single subject, skill, or area of expertise, often at the expense of broader knowledge or flexibility
Usage: British spelling (American: overspecializes); third person singular present tense

Examples

• The student overspecialises in mathematics and neglects other important subjects.
• He overspecialises in one programming language instead of learning multiple tools.
• The company overspecialises in a single product line, making it vulnerable to market changes.
• She overspecialises in medieval history and struggles to teach broader European studies.
• When a researcher overspecialises too early, they may miss important interdisciplinary connections.
• The athlete overspecialises in one sport and lacks overall fitness.
• Modern education sometimes overspecialises students before they have developed foundational skills.