Demeanour vs. Demeanor: What's the Difference?

Demeanour and Demeanor Definitions
Demeanour
Alternative spelling of demeanor
Demeanor
The way in which a person behaves; deportment.
Demeanour
(behavioral attributes) the way a person behaves toward other people
Demeanor
(American spelling) The social, non-verbal behaviours (such as body language and facial expressions) that are characteristic of a person.
The man's demeanor made others suspicious of his intentions.
A confident demeanor is crucial for persuading others.
Demeanor
Management; treatment; conduct.
God commits the managing so great a trust . . . wholly to the demeanor of every grown man.
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Demeanor
Behavior; deportment; carriage; bearing; mien.
His demeanor was singularly pleasing.
The men, as usual, liked her artless kindness and simple refined demeanor.
Demeanor
(behavioral attributes) the way a person behaves toward other people