for all the hours of a week during which it is usual for people to work, study etc [↪ part-time]
work/study etc full-time
She works full-time and has two kids.
The success of the series enabled her to concentrate full-time on writing.
full-time staff/student etc
They're looking for full-time staff at the library.
to be very hard work and take a lot of time:
Keeping pace with changes is a full-time job.