P&L en · NOUN Meanings (abbreviation, alt-of, countable, uncountable) Abbreviation of profit and loss. alt of profit and loss Mark-to-market is the calculation that shows your unrealized P&L based on where you could close your open positions in the market at that instant. 2011, Mark Galant, Brian Dolan, Currency Trading For Dummies, John Wiley & Sons, →ISBN, page 52: Forms SpellingFeaturesLabelsSource P&Ls Number=Plur lexicographic Deriveds EP&L · P&L statement