Alignment means any specific arrangement that is in line or a proper position. It also means any alliance, agreement, or approval with something.
This means a formation/arrangement that is in line, along with the ground plan in relation to factors like the layout, direction, ground plan, and others. It also means agreeing with, approving, or being in agreement with something.
In real estate, alignment basically means the house or building alignment. This means the outside wall or boundary which should be in line as per the construction plans for the property. The alignment defines the built-property, determining the street and landscapes in any area. Homes can only be constructed within the alignments of the building.
