Our plan was to have the guests park on the street, not the lawn.
When we met them at the restaurant, they said there had been a change of plan.
He changed his long-distance plan.
Origin of PLAN
French, plane, foundation, ground plan; partly from Latin planum level ground, from neuter of planus level; partly from French planter to plant, fix in place, from Late Latin plantare — more at floor, plant
plan, design, plot, scheme, project mean a method devised for making or doing something or achieving an end. plan always implies mental formulation and sometimes graphic representation <plans for a house>. design often suggests a particular pattern and some degree of achieved order or harmony <a design for a new dress>. plot implies a laying out in clearly distinguished sections with attention to their relations and proportions <the plot of the play>. scheme stresses calculation of the end in view and may apply to a plan motivated by craftiness and self-interest <a scheme to defraud the government>. project often stresses imaginative scope and vision <a project to develop the waterfront>.