verb

1. RECOGNIZE, accept (someone) to be what is claimed or accept his power and authority
2. RECOGNIZE, perceive to be the same
3. RECOGNIZE, be fully aware or cognizant of
4. RECOGNIZE, express obligation, thanks, or gratitude for
5. RECOGNIZE, express greetings upon meeting someone
6. RECOGNIZE, detect with the senses
7. RECOGNIZE, grant credentials to
8. RECOGNIZE, show approval or appreciation of
9. RECOGNIZE, exhibit recognition for (an antigen or a substrate)
10. RECOGNIZE, to know and remember (someone or something) because of previous knowledge or experience
11. RECOGNIZE, to accept or be aware that (something) is true or exists
12. RECOGNIZE, to accept and approve of (something) as having legal or official authority

1. I didn't recognize you at first with your new haircut.
2. I can always recognize him from far away by the way he walks.
3. They recognized the odor at once.