What does PM stand for? by Highlands | May 31, 2023 | 0 comments A What does PM stand for? Category: Air Purifiers PM stands for Particulate Matter. This term is used when talking about a microscopic mixture of solid particles and liquid droplets found in the air. Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.