Thermostat: A device that is used to determine and regulate temperatures in the fridge and freezer. The thermostat usually comes in the form of a dial, slide or digital controls.
Top-mount: A model of fridges in which the freezer is located above the fridge compartment. Top-mounts are generally the cheapest and most commonly available option, and have reasonably wide shelves.
Ventilation gap / Minimum air clearance: The minimum amount of empty space that must be left at the top, back, and sides of the fridge. This allows the hot air that is produced on the outside of the fridge to properly disperse.
Door alarm: This refers to an alarm which alerts you when the fridge door has been left open. The door alarm will usually sound after the fridge has been left open for over two minutes.
Child lock: A child lock is a safety feature on a lot of new refrigerator models. The Child lock setting locks the door so children cannot access the fridge without your knowledge.
Drink hatch: This is a window in the fridge door that you can open to access frequently used items without needing to open the whole fridge door. Drink hatches are mostly found on side by side fridges and help to reduce energy consumption.