'Upstroke' definitions:

Definition of 'upstroke'

From: WordNet
noun
A stroke normally made in an upward direction

Definition of 'Upstroke'

From: GCIDE
  • Upstroke \Up"stroke`\, n. An upward stroke, especially the stroke, or line, made by a writing instrument when moving upward, or from the body of the writer, or a line corresponding to the part of a letter thus made. [1913 Webster]
  • Some upstroke of an Alpha and Omega. --Mrs. Browning. [1913 Webster]