recognize, recognise -- (show approval or appreciation of; "My work is not recognized by anybody!"; "The best student was recognized by the Dean")
accredit, recognize, recognise -- (grant credentials to; "The Regents officially recognized the new educational institution"; "recognize an academic degree")
spot, recognize, recognise, distinguish, discern, pick out, make out, tell apart -- (detect with the senses; "The fleeing convicts were picked out of the darkness by the watchful prison guards"; "I can't make out the faces in this photograph")
greet, recognize, recognise -- (express greetings upon meeting someone)
acknowledge, recognize, recognise -- (express obligation, thanks, or gratitude for; "We must acknowledge the kindness she showed towards us")
acknowledge, recognize, recognise, know -- (accept (someone) to be what is claimed or accept his power and authority; "The Crown Prince was acknowledged as the true heir to the throne"; "We do not recognize your gods")