See also: lpi, and lpí English Adjective LPI (not comparable) (military) Initialism of low-probability-of-intercept. See also LPIR Noun LPI (countable and uncountable, plural LPIs) (transport, countable) Initialism of leading pedestrian interval, a brief period when pedestrians are allowed to start crossing a street before vehicles are allowed to move. (UK, finance) Initialism of limited price indexation. Proper noun LPI (astronomy, US) Initialism of Lunar and Planetary Institute. Anagrams LIP, PIL, lip, lip-Wikiwand - on Seamless Wikipedia browsing. On steroids.