For the first time she glimpsed the truth about her sister.
WORD CHOICE: WORD CHOICE: glance, glimpseglance (verb) means 'to look quickly and deliberately' and a glanceis the act of quickly looking at someone or something• I glanced at my watch. • She gave me an amused glance.glimpse (verb) means 'to see something or someone by chance for a very short time' and a glimpseis a sight that you see by chance for a very short time• I glimpsed someone behind the curtain. • We got a glimpse of her face as she hurried past. ➔ See alsoglance
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.