The piece of ground in the outfield on the catcher's right(noun)
The fielding position of the player on a baseball team who is expected to field balls in the right third of the outfield (looking from home plate)(noun)
WordNet. Princeton University. 2010.
Use "rightfield" in a sentence
"Aaron Hill's grounder to short got the second run in and Adrian Gonzalez dropped a pop up in short rightfield on which he did force the runner at second base allowing the third run to cross."
"The downpour so hard you could probably have swam in short rightfield."
"Or that it was Yankee Stadium's "friendly"—that is, short—rightfield porch that gave Maris an unfair advantage."