Press / Depress

Hi,
What's the difference between press and depress?
Eg. This will happen when you press/depress the button...
Is there a difference?
If there is, is it considering the release half (or way back) in the process of your finger pressing and releasing the button?

Simple pushing and relesing a button.

does that mean depress means you have to release?

Only time I have seen the 2 terms used to imply a different meaning ( and in my opinion a bad use of language ) was in the case of push button switches that you push to turn on ( press ) and then re-push to turn off( depress ). These switches were the mechanically latching types that have the contacts latch, but the button returns to the fully extended position.