Learner's definition of LAWN
an area of ground (such as the ground around a house or in a garden or park) that is covered with short grass
We had a picnic on the lawn in front of the monument.
a neighborhood with well-kept lawns
He planned to mow the lawn [=cut the grass on his lawn] early Saturday morning.
(US) We're having a lawn party [=an outdoor party on a lawn] to celebrate our daughter's graduation.
see picture at house