Plain English Meaning
LP is a satellite-based approach that gives you a precise left/right course to the runway — as tight as an ILS — but no glide path. You follow the course laterally and step down to a minimum altitude, then look for the runway.
Full Definition
A type of WAAS-based RNAV instrument approach that provides lateral guidance with accuracy and sensitivity similar to an ILS localizer, but no vertical guidance. The pilot flies the lateral course using GPS/WAAS signals and descends in steps to a published Minimum Descent Altitude (), as in a . LP are published only where or prevent publication of an approach.