1. intended to teach or instruct; designed to convey information or lessons
Usage: formal or literary; often used in educational or academic contexts
2. excessively concerned with teaching or moralizing; pedantic or preachy
Usage: often carries a negative connotation

Examples

• The museum's didactical approach to art history helped visitors understand each painting's context.
• Her didactical tone in the lecture made some students feel talked down to.
• The author's didactical purpose was to teach readers about environmental conservation.
• Critics found the film too didactical, preferring entertainment over moral lessons.
• The teacher used didactical methods to ensure all students grasped the difficult concept.
• The novel's didactical elements were woven seamlessly into the narrative.