the day, week, month, etc. before last
Before the last such time period. This phrase is usually used with quantities of time, such as years, months, and weeks. I can't believe that Aunt Marie is in the hospital. I just talked to her the week before last, and she was totally fine! I got my degree the year before last.
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the day, week, month, etc. before ˈlastthe day, week, etc. just before the most recent one; two days, weeks, etc. ago: I haven’t seen him since the summer before last.
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