n. One who meddles or interferes in something not of their concern.
the GNU version of the Collaborative International Dictionary of English
n. One who meddles; one who interferes or busies himself with things in which he has no concern; an officious person; a busybody.
The Century Dictionary and Cyclopedia
n. One who meddles; one who interferes or busies himself with things in which he has no personal or proper concern; an officious person; a busybody.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. an officious annoying person who interferes with others
Word Usage
"So a process that involves such meddling by a competent meddler is conceivable but I do not believe that natural forces alone would generate cells on a lifeless planet."