lose-lose adjective 1noun 1 adjective1 •Having negative outcomes for both or all parties involved; having multiple outcomes that are all bad."It's a lose-lose situation. It can be turned into a win-win. We should be encouraging and supporting expensive bi-mode freight locomotives, especially where capacity is constrained. — 2024 noun1 •Ellipsis of lose-lose situation: A situation that harms both or all parties involved, or one that has multiple outcomes that are all bad.