lawn tennis

from The Century Dictionary.

• noun A game played with a ball and rackets on a lawn or other smooth surface by two, three, or four persons.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun tennis played on a grass court

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a game played with rackets by two or four players who hit a ball back and forth over a net that divides the court