"Impingement" refers to the act of something pressing, crushing, or impacting against or on something else. It can be used to describe physical collision or compression, often resulting in pain or restriction of movement. Full definition
The Use of Ultrasound Images in Manual Therapy and Additionally in Assessment of Shoulder Impingement Syndrome (scirp.org)
As your arm is raised overhead and gets pushed to its limit, the space where your rotator cuff tendons and shoulder sub-acromial space (shoulder bursa) reside becomes smaller, so if you feel pain in your shoulder while performing this motion, it's most likely caused by impingement of the tendons or the shoulder bursa in that area of your shoulder. (fitnessandpower.com)
A specialty retailer's perspective on legislative impingements on selling big snakes and its impact on the pet trade. (petbusiness.com)