Meatloaf was a type of food created by combining, among other things, meat and bread.
The resequenced meatloaf served aboard Enterprise NX-01, according to Travis Mayweather, was something to be avoided. (ENT: "Fortunate Son")
While trying to survive in Shuttlepod 1, Trip Tucker had a meatloaf with gravy and mashed potatoes ration. (ENT: "Shuttlepod One")
A meatloaf ration pack was among the items an away team of Enterprise found inside the base of the Osaarian pirates. (ENT: "Anomaly")
In 2266, Thanksgiving was being celebrated on board the USS Enterprise. Captain James T. Kirk was irritated that the crew had to eat synthetic meatloaf and asked that it be made to look like a turkey. (TOS: "Charlie X")
In 2370, in a holographic simulation of Enterprise NX-01's final mission, Trip Tucker asked William T. Riker (posing as the the chef) whether the captain asked for meatloaf. Riker said he hadn't talked to Archer yet. (ENT: "These Are the Voyages...")