Definition of "Acknowledge" :

verb: 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."

verb: accept as legally binding and valid

"Acknowledge the deed."

verb: declare to be true or admit the existence or reality or truth of

"She acknowledged that she might have forgotten."

verb: express obligation, thanks, or gratitude for

"We must acknowledge the kindness she showed towards us."

verb: report the receipt of

"The program committee acknowledged the submission of the authors of the paper."

verb: express recognition of the presence or existence of, or acquaintance with

"He never acknowledges his colleagues when they run into him in the hallway."