For me it actually means the same thing over and over. Had a guy with "15 years" of experience interview one time. He analyzed scientific data, sounded good. When we got into it he'd literally been writing/managing a parser in perl for a data sent with only minor changes. He did this for 15 years. Terrific waste of time. That guy was what I meant. He'd solved a specific set of problems over and over and never grown beyond that.