• Webster's Revised Unabridged Dictionary
    • n Nonimportation Want or failure of importation; a not importing of commodities.
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Century Dictionary and Cyclopedia
    • n nonimportation A refraining from importing, or a failure to import.
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In literature:

The illustration, then, has become the important thing and the material nonimportant.
"How to Teach" by George Drayton Strayer and Naomi Norsworthy
Braden, in his opinion, was simply bluffing as to the nonimportance of the deeds.
"The Land of Strong Men" by Arthur M. Chisholm