A support of Window or regingot or rejingot is a part built prefabricated or cast in place intended to support the low cross-piece of the door frame of the window while evacuating the water of bay outside without streaming on the frontage. In Quebec the Rejingot is often called wrongly reduces.

A windowsill can be:

• with or without ears
• with or without nose (in this case one says that it is levelled)

In other provisions, in particular in the resistance of materials, the support is the junction point or of fixing of certain elements of structure such as the beam, the beam, the flagstone, etc It can be fixed without any possibility of displacement like in the case of an embedding, or with a certain degree of freedom like in the case of a simple support or of a kneecap.