From Tardis Wiki, the free Doctor Who reference

A refrigerator, also known as a fridge, was an appliance for preserving organic material by keeping it cold.

After regenerating, the Eleventh Doctor plundered the refrigerator in Amy Pond's house while trying to figure out what foods he now liked. (TV: The Eleventh Hour)

There was an Animaniacs sticker on Rani Chandra's refrigerator. (TV: The Mark of the Berserker)

Fridges were not yet invented in Roman times. While in a Roman villa in 64, Barbara Wright jokingly told Ian Chesterton there was ice in the fridge. Ian started looking for the fridge before realising what Barbara had said. Later, after returning from their adventure, Ian did the same to Barbara when he told her that there was some cold peacock left in the fridge. (TV: The Romans)