the GNU version of the Collaborative International Dictionary of English
n. The act of precluding, or the state of being precluded; a shutting out.
The Century Dictionary and Cyclopedia
n. The act of precluding, or the state of being precluded, in any sense of that word.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the act of preventing something by anticipating and disposing of it effectively
Word Usage
"Empirical evidence for other arguments: when someone uses a known mark like APPLE for unrelated goods, that has some market preclusion effects on Apple, because it prevents Apple from moving into that market later."