Wiktionary
n. 1 (context baseball English) A large protective glove used by a catcher when playing baseball. 2 (context slang English) A contraceptive diaphragm (sense 3).
Wikipedia
Catcher's Mitt is the name of a study being conducted (as of December 2009) by the United States Defense Advanced Research Projects Agency (DARPA) to "better understand the issues and challenges involved with removing man-made debris from earth orbit." DARPA's goal is to use the study to determine both if DARPA should invest more resources in orbital debris removal and, if so, how to best do so.
Usage examples of "catcher's mitt".
He opened the door as quietly as he could, but they heard him, and hauled him front and center into the living room where he stood flushing, with his head down, one sock around his ankle, and his arms full of books and a catcher's mitt.
I think it would have improved if she'd gone after flies with almost anything except a catcher's mitt.
Even from center field Kerry could sense the confusion in the Belgorvian hitting machines as Johnson's pitches splatted into the catcher's mitt.
Barry Harman had studied for weeks in hopes of winning the catcher's mitt his father had promised him if he finished first -- but when it was Tommy Niles' turn to recite, he began with _In the beginning God created the heaven and the earth_, continued through _Thus the heavens and the earth were finished, and all the host of them,_ headed on into _Now the serpent was more subtle than any beast of the field which the Lord God had made,_ and presumably would have continued clear through Genesis, Exodus, and on to Joshua if the dazed proctor hadn't shut him up and .
His skin had the color and texture of a well-oiled catcher's mitt.
Inside a large television screen had Lyndon Johnson's living face on it, the big catcher's mitt of a puss with the beanbag ears.
The leathery depths swallow his ass like a catcher's mitt accepting a baseball.
The ball snapped out of his mass of tentacles, flickered, and appeared in the catcher's mitt.
He left his catcher's mitt on the table, worn and deeply pocketed and curiously alive.
Richard Parker opened his maw and the squealing rat disappeared into it like a baseball into a catcher's mitt.
Instead, the huge catcher's mitt damped the bounce into rippling waves.
Rico would catch for both teams, and again I was sent to the house, this time to fetch my father's old catcher's mitt and my other ball.