RASM Views 7 meanings found RASM is chiefly used as a performance metric in the airline industry, measuring revenue generated per available seat mile, while the same letters occasionally appear in biomedical research referring to rat aortic smooth muscle. Miscellaneous Ramm Annual Support And Maintenance Rat Aortic Smooth Muscle Risk Assessment Searching Mechanism Governmental Remote Access Scheduling Terminal Raelian Association of Sexual Minorities Business Revenue per Available Seat Mile Rochester Association for Systems Management