Of a state of affairs, a purpose, a proposed course of action, etc.: desirable, proper, fitting; (later… Predicative, with non-referential it as…

Suitable for a specified or implicit purpose or requirement; appropriate to the circumstances or conditions; of the requisite standard or type…

In Middle English: Proper, of the right sort, good.

Fitting, suitable, proper. Const. for, to.

Suitable, beseeming, fitting; according. Obsolete.

Appropriate to the circumstances or for a particular purpose; fitting, proper; (also) according to fact or convention; correct.

Of an action or concrete thing: Respectable, decent, becoming, proper, as it should be. Obsolete.

Becoming, befitting; proper, suitable; appropriate. Cf. fitting, adj. a. In predicative use. Usually with to or for and complement. Frequently in…

Chiefly attributive. More generally: that is as it ought to be; occurring, done, etc., as is fitting, expected, or natural; correct, right, proper.

Suitable for a specified or implicit purpose; of the requisite standard or type; proper, appropriate, fitting. Obsolete.

Convenient, proper; due, appropriate. Chiefly in with (also in) all goodly haste (also expedition, etc.). Obsolete.

Morally or ethically suitable or becoming; proper. Obsolete.

In conformity with approved standards of action or conduct; right, proper. Now archaic. In predicative use. Obsolete.

Seemly, proper, fitting.

Appropriate, seemly, befitting. Now archaic and rare.

Befitting the person or the circumstances, agreeable to decorum, becoming, convenient, proper, right. Const. as above. Now only in predicative…

Meet, becoming, seemly, proper, decent. Obsolete.

Appertaining, appropriate, fitting.

That fits. Becoming, appropriate, proper, suitable.