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1. Having the qualities of a good companion; friendly. See Synonyms at social.
2. Suggestive of or conducive to companionship: reading together in companionable silence.

com·pan′ion·a·ble·ness n.
com·pan′ion·a·bly adv.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.companionableness - suitability to be a companion
sociability, sociableness - the relative tendency or disposition to be sociable or associate with one's fellows
References in classic literature ?
They were three days on their journey, and Marianne's behaviour as they travelled was a happy specimen of what future complaisance and companionableness to Mrs.