To keep a record of things that happen. There are all kinds of log books for all kinds of things. But their basic purpose is to keep a record of events, problems etc. in relation to the thing they are associated with.
I am expected to do a logbook for my novel. How do I do that?
because it's logbook
the logbook is where you put the records of things
Yes, the word logbook is a compound word mad up of the words 'log' and 'book'.
mumu
A science fair logbook is just a notebook where you keep track of the work you have done on your science fair project.
logbook
To show where they have flown
logbook
logbook, or just log.
Logbook
In the house