Meaning of “tune (sth) up” in the English Dictionary

(Definition of “tune (sth) up” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"tune sth up" in Business English

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tune sth up

phrasal verb with tune uk /tjuːn/ us verb [ T ]

to make small improvements to something so that it is as good as possible:

We'll advise you on how to tune up your portfolio for the end of the financial year.
This course will help you tune up your computer skills.
Morale was high as the sales team tuned up for the big campaign here in America.

(Definition of “tune sth up” from the Cambridge Business English Dictionary © Cambridge University Press)