There are numerous synonyms for the phrase "glance at" that can be used to convey the same meaning in various contexts. Some of the most commonly used synonyms include "peek at," "glimpse," "look over quickly," "scan," "cast a quick look," "take a quick look," and "briefly glance." These phrases can be applied to many different situations, from quickly turning your head to see what's behind you, to taking a brief look at a document or report. No matter which synonym you choose to use, the key is to convey the idea that you're not spending an extended period examining something, but simply taking a quick, fleeting look.