Observe closely is an important phrase that can be used in many different contexts. It is often used to indicate that someone should pay close attention to something, or to be aware of their surroundings. The crossword solutions for this phrase are NOTE (4 letters), EYEBALL (7 letters), EYE (3 letters), EXAMINE (7 letters), and KEEPTABSON (10 letters). Each of these words can be used to describe the act of observing closely, whether it be through taking notes, looking intently, or examining something in detail. Keeping tabs on something also implies that one should be paying close attention to it.