A memory or recollection; an impression retained in memory. Often used in expressions like 'to have a memory of' or 'to feel'.
その人の顔に覚えがあるが、名前が思い出せない。
I recognize that person's face, but I can't remember the name.
単語の覚えが早い人もいれば遅い人もいる。
Some people learn words quickly, while others are slower.
以前読んだ本の内容に覚えがない。
I have no recollection of the contents of the book I read before.