1. substances that cause irritation or inflammation to the skin, eyes, or other body parts
Usage: medical; scientific
2. things or people that cause annoyance or frustration
Usage: informal

Examples

• Chemical irritants in the cleaning products caused her skin to break out.
• Common household irritants include dust mites and pet dander.
• The doctor advised avoiding known irritants while the rash healed.
• Loud noises and bright lights were major irritants during his migraine.
• Traffic jams and long lines are daily irritants for many people.
• She tried to eliminate all irritants from her workspace to improve focus.