keep/have an/your ear to the ground
keep an ear to the groundand have an ear to the ground; keep one's ear to the ground; have one's ear to the ground
Fig. to devote attention to watching or listening for clues as to what is going to happen. John had his ear to the ground, hoping to find out about new ideas in computers. His boss told him to keep his ear to the ground so that he'd be the first to know of a new idea.
keep your ear to the groundor
have your ear to the groundmainly BRITISH
If you keep your ear to the ground or have your ear to the ground, you make an effort to be aware of what is happening around you. Keep your ear to the ground. Know who is coming and who is going: a new vacancy could be an opportunity for you. Paul had his ear to the ground and always knew about future concerts before anyone else Note: In films, Native Americans used to be shown tracking people or animals by listening carefully to the ground for the sound of their footsteps.
have (or keep) an ear to the groundbe well informed about events and trends.
The idea behind this phrase is that by putting your ear against the ground you would be able to hear approaching footsteps.