from The American Heritage® Dictionary of the English Language, 5th Edition.

  • preposition In reference to.

from The Century Dictionary.

  • Having interest or moment; important.
  • Pertaining to; regarding; with relation to; as to; about.
  • noun An affair of importance; concern; business.

from the GNU version of the Collaborative International Dictionary of English.

  • noun That in which one is concerned or interested; concern; affair; interest.
  • noun Importance; moment; consequence.
  • noun Concern; participation; interposition.
  • noun Emotion of mind; solicitude; anxiety.
  • adjective Archaic Important.
  • preposition Pertaining to; regarding; having relation to; respecting; as regards.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Causing concern; worrisome.
  • preposition Regarding, respecting.
  • verb Present participle of concern.


from Wiktionary, Creative Commons Attribution/Share-Alike License

From concern +‎ -ing. The adjective and preposition follow from the verb.



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