know by sight

Meaning

1. know sb by sight

   to recognize sb without knowing them well

In the movies · 1

• But you have a large class and he can get lost, you know, from sight if you're not looking. I'm not saying you're not looking...Finding Nemo2003
• An old maid like me may not know much about raising a child, but I know a darn sight more than a bachelor like you.Anne of Green Gables1985

From the same entry

• before you know where you are
• be not to know
• for all you, I, they, know
• God knows
• I don't know how, why, etc.
• I know
• know as well as I do
• know backwards
• know best
• know better
• know different
• know full well