RECOGNIZE

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

Example: "The crown prince was acknowledged as the true heir to the throne"

Be fully aware or cognizant of

Detect with the senses

Example: "The fleeing convicts were picked out of the darkness by the watchful prison guards"

Perceive to be the same

Grant credentials to

Example: "The regents officially recognized the new educational institution"

Express greetings upon meeting someone

Express obligation, thanks, or gratitude for

Example: "We must acknowledge the kindness she showed towards us"

Exhibit recognition for (an antigen or a substrate)

Show approval or appreciation of

Example: "My work is not recognized by anybody!"