rpm
noun
UK (US r.p.m.) ukusplural rpm or or rpms TRANSPORT
abbreviation for revolutions per minute: used when stating the number of times part of a machine, engine, etc. goes around during a minute:
at 600/7200/19,000, etc. rpm(s) We're trying to make engines that spin at more than 19,000 rpm.
low/high rpm(s)
The engine rpm remained relatively constant.
COMMERCE, FINANCE
abbreviation for resale price maintenance