Definition of "Recognize" :

verb: accept (someone) to be what is claimed or accept his power and authority

"We do not recognize your gods."

verb: perceive to be the same

verb: be fully aware or cognizant of

verb: express obligation, thanks, or gratitude for

verb: express greetings upon meeting someone

verb: detect with the senses

verb: grant credentials to

"The Regents officially recognized the new educational institution."

verb: show approval or appreciation of

"My work is not recognized by anybody!."

verb: exhibit recognition for (an antigen or a substrate)