also with-it
1.
If you say that someone is ~, you mean that they are fashionable or know about new things, especially in culture. (INFORMAL, OLD-FASHIONED)
ADJ
2.
If someone is not ~, they do not feel alert and therefore fail to understand things. (INFORMAL)
She wasn’t really ~. She hadn’t taken in the practical consequences.
ADJ: v-link ADJ, usu with brd-neg