American Heritage Dictionary
(5)
Century Dictionary
(4)
GNU Webster's 1913
(2)
WordNet
(3)
Elsewhere on the web
AppleInsider noted this would include a trimming -- or tapering -- around the edges and instances of black material to contrast the largely aluminum motif of the new notebooks.— AppleInsider
Most pet's nails grow quickly, so regular trimming is a must.— The Seattle Times
The EPA needs severe trimming, and Judge Colleen Kollar-Kotelly needs to resign.— Latest Articles
Trimming -- The Flat-Coat is shown with as natural a coat as possible and must not be penalized for lack of trimming, as long as the coat is clean and well brushed.
Computer modeling and secondary processing such as trimming, machining, pressure testing, painting, assembly, plating, sanding and grinding.— CantonRep.com Home RSS

Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about once a week.