What is Toe ?
Toe is (noun) 1. one of the five parts like fingers at the end of the foot She trod on my toe and didn’t say she was sorry. the big toe the largest of the five toes the little toe the smallest of the five toes to keep someone on their toes to keep someone ready or alert My job is to make sure the staff are always on their toes. 2. the end part of a shoe or a sock There’s a hole in the toe of my sock. (verb) to toe the line to do what you are told to do He was sacked because he refused to toe the line.
source: Easier English, Student Dictionary Upper Intermediate Level