Meaning: The reader was so engrossed in the book that they didn't notice how much time had passed.
Choice of Words: Slipped - moved or passed by smoothly and quietly.
Alternative Expressions
Time flew by unnoticed.
Meaning: This means that time passed by very quickly without anyone realizing it. It's like saying, The time went by so fast that we didn't even notice.
Choice of Words:Time is a concept that refers to the continuous passage of events, from the past through the present and into the future. Flew means to move quickly and smoothly through the air. By means past something. Unnoticed means not seen or observed. When you put them together, "Time flew by unnoticed" means that time passed by very quickly without being noticed or realized.
Time crept by unnoticed.
Meaning: This means that time passed by very slowly without anyone realizing it. It's like saying, The hours seemed to drag on forever, and we didn't notice how much time had passed.
Choice of Words:Time is a concept that refers to the continuous passage of events, from the past through the present and into the future. Crept means to move slowly and quietly. By means past something. Unnoticed means not seen or observed. When you put them together, "Time crept by unnoticed" means that time passed by very slowly without being noticed or realized.