Encroachment

1. n. An unlawful diminution of the possessions of another.
2. n. The act of entering gradually or silently upon the rights or possessions of another; unlawful intrusion.
3. n. That which is taken by encroaching on another.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.