the GNU version of the Collaborative International Dictionary of English
adj. Not obtrusive; not presuming; modest.
The Century Dictionary and Cyclopedia
Not obtrusive; not forward; modest; inconspicuous.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. not obtrusive or undesirably noticeable
Word Usage
""Nudging people for their own benefit in unobtrusive ways is part of what the co-authors call “libertarian paternalism,” a seeming oxymoron that links the notions of freedom from constraint and firm, well-intentioned guidance.""