Respuesta :

It means a quick look
glance: to take a brief or hurried look (at something or someone).
e.x: "The detective got a quick glance at the suspect."

glanced: -past tense, already done- to take a brief or hurried look (same definition, just used in context differently)
e.g: "Ginny glanced at her watch."

Hope this helps! 
Good luck!