1. products used to improve the condition or quality of hair, making it softer and more manageable
2. devices or substances that improve the condition of air, water, or other materials
3. people or things that condition or train others

Examples

• She uses different conditioners for her curly hair.
• The salon offers organic conditioners made from natural ingredients.
• Water conditioners help remove minerals that cause hard water.
• Air conditioners keep the building cool during summer.
• The gym has several conditioners who help members improve their fitness.
• These fabric conditioners make clothes feel softer after washing.