the GNU version of the Collaborative International Dictionary of English
n. utmost importance.
The Century Dictionary and Cyclopedia
n. The state or quality of being momentous or of grave importance.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. utmost importance
Word Usage
"It is his own favourite "serious methods;" it is his own favourite "momentousness;" it is his own favourite "judgment" which stops the way everywhere."