to restore strength or vigour to (somebody), e.g. by food or rest
to restore bring back the freshness or colour to (something stale or faded)
to restore or maintain (something) by a fresh supply
The waiter refreshed our glasses
to arouse or stimulate (e.g. the memory)
in computing, to update the data in (a file, Web page, etc)
[Middle English refresshen from Old French refreschir, from re- + freis fresh1]