Someone who notices things quickly could be called perspicacious. Definition: having a ready insight into and understanding of things: it offers quite a few facts to the perspicacious reporter. Derivatives: perspicaciously adverb Origin early 17th cent.: from Latin perspicax, perspicac- 'seeing clearly' + -acious .

What do u call someone who notices everything?

If someone calls you perceptive, they mean you are good at understanding things or figuring things out. Perceptive people are insightful, intelligent, and able to see what others cannot. ... If you are upset but trying to hide it, a perceptive person is the one who will notice.

What does it mean when someone notices something?

[intransitive, transitive] to see or hear someone or something; to become aware of someone or something People were making fun of him but he didn't seem to notice. notice somebody/something The first thing I noticed about the room was the smell.