1. the act or process of relieving congestion, especially nasal or respiratory congestion caused by a cold or allergy
Usage: commonly used in medical and pharmaceutical contexts
2. the reduction or elimination of traffic congestion on roads or in urban areas
Usage: used in urban planning and transportation contexts

Examples

• The decongestant spray provided quick decongestion of her sinuses.
• Saline nasal drops are often used for decongestion in infants.
• The city implemented new bus routes for decongestion during rush hour.
• Decongestion of the highway was achieved by opening additional lanes.
• Over-the-counter medications can help with decongestion when you have a cold.
• Urban planners focused on decongestion strategies to improve air quality.