Definition
Upright, as opposed to italic or oblique. Used to describe the posture of letterforms that stand vertical on the baseline. Roman type is orthotic; italic type is not. The term is used by Bringhurst as a more precise alternative to "upright" or "roman" when describing letterform posture independently of historical style.
Source
— Robert Bringhurst — p. 327:
Upright, as opposed to italic or oblique.
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