Recognize

1. 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”

   Similar: acknowledge, recognise, know

2. verb

   exhibit recognition for (an antigen or a substrate)

3. verb

   express obligation, thanks, or gratitude for

   “We must acknowledge the kindness she showed towards us”

   Similar: acknowledge, recognise

4. verb

   express greetings upon meeting someone

   Similar: greet, recognise