recognize

1. To match (something or someone which one currently perceives) to a memory of some previous encounter with the same person or thing.

   I recognised his face immediately.

2. To acknowledge the existence or legality of; to treat as valid or worthy of consideration.

   The US and a number of EU countries are expected to recognize Kosovo on Monday.

3. (or with clause) To acknowledge or consider (as being a certain thing or having a certain quality or property).

   I recognize that my behaviour has been unacceptable.

4. To realize or discover the nature of something; apprehend quality in.
5. To show formal appreciation of, as with an award, commendation etc.

   His services were recognized in a testimonial.

6. To review; to examine again.
7. To reconnoiter.
8. To have the property to bind to specific antigens.

verb

To cognize again