Definition: a flat outer surface of an object, especially one that is not the top or the bottom Level: A2
她名字的首字母被刻在了木盒的侧面。
Her initials were carved on the ___side of the wooden box.
记住只写在纸的一面。
Remember to write on one ___side of the paper.
请使用侧门，前门锁上了。
Please use the ___side door; the front is locked.
