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1. adjective (typically hyphenated and used before a noun) Of, covering, or to do with a long, indefinite, or future period of time. It's great that you have some long-run goals and ambitions for the business in mind already, but we really need some immediate solutions in place now if we want to survive beyond Christmas.
2. noun A relatively long or extended length of time; an indefinite period that encompasses many potential changes or effects. This latest merger deal will take care of the long run for both companies. This minimum wage increase may have some negative effects on businesses at first, but they will be dwarfed by the benefits yielded in the long run.
(used before a noun) Involving, maturing after, or lasting for a long period of time. Our team has come up with a number of long-run solutions to our financial problems, but we'll have to make some sacrifices for them to be effective. If you're thinking of starting a savings account, it's good to have some long-run goals for how much you want to put aside each month.