1858, from re- + focus (v.). Related: Refocused; refocusing.
The physicist refocused the light beam
The group needs to refocus its goals
refocus the image until it is very sharp
reflector
reflex
reflexive
reflexology
reflux
refocus
reforest
reform
re-form
reformable
re-formation
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}