Emily Dickinson Lexicon

MAG'NI-TUDE, n. [L. magnitudo.]

1. Extent of dimensions or parts; bulk; size; applied to things that have length, breadth or thickness.
2. Greatness; grandeur. With plain heroic magnitude of mind. Milton.
3. Greatness, in reference to influence or effect; importance. In affairs of magnitude, disdain not to take counsel.