interference

Definitions:

The intermeddling in the affairs of others; interposition; in optics, a term used to express certain phenomena which result from the mutual action of the rays of light on each other.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (noun) (n.) (noun)
The act of clashing with; the act of meddling in other people's affairs.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (noun) (n.) (noun)
Interposition; an intermeddling; a collision; interaction among waves; a striking of one foot against the other.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (noun) (n.) (noun)

Usage examples:

It cannot, therefore, be a discussion upon interference or non- interference that has long since been disposed of by our words and acts.
- With the "Die-Hards" in Siberia by John Ward
The subject of court interference was not altogether new in the eighties.
- A History of Trade Unionism in the United States by Selig Perlman
When a matter can be managed without my interference it is not proper for me to speak on the subject.
- Flowers from a Persian Garden and Other Papers by W. A. Clouston