If a frozen steak is safely defrosted, it’s ok to refreeze it for future consumption. The safest way to defrost a steak is to leave it in its wrappings and place it in the refrigerator until it’s thawed. By keeping the steak consistently under 40F, you remove the opportunity for harmful bacteria to form.
If you decide not to cook a defrosted steak, move it back to the freezer ASAP, and maintain an airtight seal on the packaging to protect it from freezer burn.
Be aware that, while safely defrosting a steak and then refreezing won’t make it go bad, it may negatively impact the flavor when you do cook it.