That is of great consequence or significance; having a serious or significant effect or influence; consequential, weighty, momentous. Also preceded…

Weighty, important; substantial; solid, firm; effective. Cf. substantial, adj. 4.

Strong, weighty, valid. Obsolete.

In general use. Bearing on or connected with the matter in hand; closely relating to the subject or point at issue; pertinent to a specified thing.

Important, significant. Obsolete.

Esp. in of weight, of great (little,etc.) weight.

Of works, employments, objects of consideration: Weighty, important; in later use chiefly, requiring serious thought, serious.

Precious in import or significance; important. Obsolete.

Full of consequence, important.

That is of relevance or interest; important, weighty. Obsolete.

of concern: of importance, interest, or relevance (to someone). In later use also: causing worry or consternation.

Of consequence, important (to). Obsolete. rare.

Of persons: Having great authority or influence; important or impressive in respect of position, views, or utterance.

That concerns, touches, affects, or is of importance; important. Obsolete.

gen. Prominent; important, significant; particular.

Pregnant with consequences, of consequence, important. Obsolete.

Characterized by magnitude; great, significant, imposing.

Big, impressive; important, foremost.

In weakened sense (without reference to specific activity or production): significant, important.