Recognize someone by their appearance without knowing their name or being so well acquainted as to talk to them.
More example sentences
- The woman and her family moved here from France sometime earlier this year, I didn't know her name but I knew her by sight.
- We all knew them by sight and they seemed a truly lovely family.
- I had known his brother very well at junior school and I knew Freddie by sight.
Definition of know someone by sight in:
- The British & World English dictionary