Different e-book platforms use the terms 'Borrowing', 'Loan', ' Download' or 'Check-Out'. However, this is not the same as borrowing a print book from the shelves.
Choosing one of these options enables you to read an e-book offline for a certain period of time. This could be a week, a day, or an e-book viewing session that finishes when you log off.
If another library owns the e-book you want, it may be possible to request a copy of a chapter or portion of the e-book through Interlibrary Loan (ILLiad).