All 3 Uses of

accord

in

The Devil and Daniel Webster

After all, we know what's been done, and it's been according to contract and specifications.†
*

according to = as stated by; or in agreement with

So it was there they sat, waiting for the stranger, with a jug on the table between them and a bright fire on the hearth—the stranger being scheduled to show up on the stroke of midnight, according to specification.†

"Perhaps 'tis not strictly in accordance with the evidence," he said, "but even the damned may salute the eloquence of Mr. Webster."†

accordance = keeping with; or agreement with

Definitions:

(1) (accord as in: according to, or in accord with)
in keeping with; or in agreement/harmony/unity with
This meaning of accord is often seen in the form according to or accordingly where it can take on more specific meanings. For example:
- "According to Kim, ..." -- as stated by
- "To each according to her ability." -- based upon
- "Points are scored according to how well they perform." -- depending upon
- "The dose is calculated according to body weight." -- in proportion to
- "We got a flat tire. Accordingly, I pulled to the side of the road." -- because of what was just said; or as a result
(2) (accord as in: reached an accord)
an agreement

In this sense, accord can refer to a formal agreement (such as one written between two countries) or an informal agreement (such as an unvoiced consensus about what should be done).
(3) (accord as in: done of her own accord)
mind

This sense of accord is typically seen in the form own accord or one accord.
(4) (accord as in: accord her the respect deserved)
to give someone special treatment -- especially respect
(5) (meaning too rare to warrant focus)