"missing what was aimed at," 1947 (in reference to missiles), from off (prep.) + target (n.).
offside
off-site
offspring
off-stage
off-street
off-target
offward
off-white
oft
often
oftentimes
)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}