1. - see keep 7
2. 继续雇用
If you keep someone on, you continue to employ them, for example after they are old enough to retire or after other employees have lost their jobs.
1. allow to remain in a place or position or maintain a property or feature
e.g. We cannot continue several servants any longer
She retains a lawyer
The family's fortune waned and they could not keep their household staff
Our grant has run out and we cannot keep you on
We kept the work going as long as we could
She retained her composure
this garment retains its shape even after many washings