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Webster 1913 Edition

adv.

In a right line; not crookedly.

adv.

A variant of

. See 1st

adv.

In a right line; not crookedly.

Tightly; closely.

straightly ‎(comparative more straightly, superlative most straightly)

In a straight manner; without curve or bend.
Without deviation; directly.
- 1817, Walter Scott, Rob Roy:
  I was directing my course towards it, as straightly and as speedily as the windings of a very indifferent road would permit [...].

agreeably; correspondingly; suitably; in a manner conformable