Dic/ some usages/ take in

─ If you take something in, you pay attention to it and understand it when you hear it or read it.
─ to understand or absorb something that you hear or read; to accept something as true.

• Lesley explains possible treatments but you can tell she's not taking it in.
• Gazing up into his eyes, she seemed to take in all he said.
• I read the whole page without taking anything in.
• He just couldn't take in what had happened.

─ If you take something in, you see all of it at the same time or with just one look.
─ to notice something with your eyes.

• The eyes behind the lenses were dark and quick-moving, taking in everything at a glance.
• He took in every detail of her appearance.
• She started to relax and take in her surroundings.

 ... COBUILD, Oxford Phrasal Verbs Dictionary for Learners of English