Dictionary entry overview: What does indefinite mean? â¢ INDEFINITE (adjective) The adjective INDEFINITE has 2 senses: 1. vague or not clearly defined or stated 2. not decided or not known Familiarity information: INDEFINITE used as an adjective is rare.
Put the tenderloins on a rack in a roasting pan, and roast them in a 450Â°F oven. After about 15 minutes, check the internal temperature with a probe thermometer. For a tenderloin that's medium-rare, look for an internal temperature of 120Â°F. For medium, the internal temperature should be 125Â°F.When the tenderloin is cooked the way you like it, let it rest at room temperature for 15 minutes before slicing. This will let the juices redistribute so the meat is juicy all over.or medium, the internal temperature should be 125Â°F. When the tenderloin is cooked the way you like it, let it rest at room temperature for 15 minutes before slicing. This will let the juices redistribute so the meat is juicy all over.
1 Put tenderloin on rack in roasting pan and roast 10 minutes, then reduce oven temperature to 425Â°F and cook until thermometer inserted diagonally into center of meat registers 130Â°F, 20 to 25 minutes for medium-rare. 2  Let beef stand on rack in pan 10 minutes before serving.