Don/dɑːn/ Definition 1 of 4Pro Tip 1/3Action Oriented Use 'don' when specifically talking about the action of dressing in something. The knight donned his armor. Pro Tip 2/3Special Occasions Often used for special clothing like uniforms or costumes, not everyday attire. She donned her graduation robe. Pro Tip 3/3Ceremonial Tone Has a formal, sometimes ceremonial connotation, not used for casual wear. He donned the ceremonial cloak.