definition of
lobby

[1] #1 lobby n. [anteroom, antechamber, entrance hall, hall, foyer, vestibule] a large entrance or reception room or area. wn

[2] #2 lobby v. [buttonhole] detain in conversation by or as if by holding on to the outer garments of; as for political or economic favors. wn

[3] #3 lobby n. the people who support some common cause or business or principle or sectional interest. wn

[4] #4 lobby n. [pressure group, third house] a group of people who try actively to influence legislation. wn