Meaning of “be on the right lines” in the English Dictionary

british dictionary

"be on the right lines" in British English

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be on the right lines

If you are on the right lines, you are doing something in a way that will bring good results:

Do you think we're on the right lines with this project?

(Definition of “be on the right lines” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)