on one's heels
01
closely following or pursuing someone or something, often in a persistent or bothersome manner
![on {one's} [heels] definition and meaning](https://cdn.langeek.co/photo/42800/original/?type=jpeg "on {one's} [heels] definition and meaning")
Idiom
Informal
Exempel
I felt constantly on my heels during that project, as my supervisor closely monitored every step I took.
02
near the point of surpassing a fellow competitor
![on {one's} [heels] definition and meaning](https://cdn.langeek.co/photo/66324/original/?type=jpeg "on {one's} [heels] definition and meaning")
IdiomInformalExempel
The two companies have been in close competition, with each one constantly on the other's heels in terms of market share.
