1. An informal usage primarily in the U.S.; the only person someone is having a romantic relationship with: When asked how long Shelby and her friend had known each other, she told Susan that he had been her steady for over a year.
2. A person or people who have been regular participants in some activity or situation: William and David have been steadies at this office for several years.

1. To keep something or someone from moving, shaking, or falling: Henry steadied himself by using the handrail as he walked up to the next floor to his apartment.
2. To cause something to stop changing, increasing, or decreasing: Prices for food have not been steadying lately.

The new medicine has been helping to steady Aurora's heart rate.

Karin took a drink of water and sat down to steady her nerves.