This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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ad. in a proper manner

ad. individually; in one's own manner

ad. In a proper manner; suitably; fitly; strictly; rightly

ad. Individually; after one's own manner.

In one's own manner, speech, action, etc.

In a proper manner; with propriety; fitly; suitably; correctly: as, a word properly applied; a dress properly adjusted.

To a high degree; quite; entirely; exceedingly; extremely.

Abbreviated properly

Speaking without qualification.

ad. with reason or justice

ad. in the right manner

"The six-shooter when properly handled is the only weapon -- mind you, sir, I say _properly "_ and here the old eyes blinked rapidly over the great art as he knew its practice."

properly speaking   

suitably    fitly    strictly    rightly    individually   

improperly