verb

• To make distinct or separate from what is common
• (obsolete, intransitive) To go into specific details.
• (rare, transitive) To specify: to mention specifically.
• (uncommon, transitive) To narrow in scope.
• (biology, transitive) To make distinct or separate due to form or function.
• (intransitive) To become distinct or separate from what is common
• To focus one's study upon a particular skill, field, topic, or genre.
• To focus one's business upon a particular item or service.
• (usually derogatory) To be known or notorious for some specialty.
• (transitive) To train (someone) in a specialty.