Vector quantity

A vector quantity is physical measurement that contains directional information, as opposed to a scalar quantity.

Force is an example of a vector quantity.

For example, when an airplane is taking off, the air under the wings is exerting a force in an upward direction, gravity is exerting a force in a downward direction, the engine is exerting a force pushing the plane forward, while winds may be exerting forces from side to side.

Temperature is an example of a scalar quantity. The temperature is simply a number of units: normal body temperature is 37° Celsius. You can't speak of an upward temperature, or a northeast temperature; it has no direction. The temperature trend however does have a direction (up or down).