Of a thing: having great value or importance; noble, fine, excellent, worthy. Obsolete.

Esp. of a person or supernatural being: great, powerful, or important; influential; = much, adj. 1c. Now somewhat rare.

Of things, places, actions, events, etc. Of considerable importance, significance, or distinction; important, weighty; distinguished, prominent…

With reference to the right hand regarded as the stronger or better of the two. Of a person: of great importance or value to another; favoured…

Of great dignity or importance. Obsolete.

Of serious or substantial import; significant, important, of consequence.

Chiefly with to. Higher in status, quality, or importance than (some other person or thing); (hence) greater or better than. Occasionally also with…

Eminent; great in reputation, position, scale of operations, etc. Obsolete.

Of a substantial or solid nature; ranking high in respect of importance or value.

Of an affair, event, etc.: highly important; having great results or important consequences; momentous. Rarely with to. Obsolete.

Destined to produce a great many results or consequences, fraught with; (also) full of significance, momentous.

= pregnant, adj.1 (in various senses).

Consisting of matter. Also: significant, important; = material, adj. 6a.

Massive, cumbrous; weighty, momentous.

Of a thing or an event: of moment; of great weight, consequence, or importance.

Producing surprising or remarkable results, like those attributed to magic (frequently in magic touch); effecting or permitting change, success…

Of the highest importance; esp. vitally important; crucial, critical.

Of an abstract or non-material thing. Of great import; significant; momentous; major. Cf. big deal, n. 2.

Of great consequence or importance; momentous.

Of a person: of great importance, influence, or prominence. Cf. colossus, n. 2a.

Relating to or concerned with everyday needs and issues; ordinary; mundane, humdrum. In later use also: basic, fundamental, very important.

Of great size or importance; chief, principal; (very) large, big.

Of paramount or crucial importance; dominant, chief, essential.

Of great importance; powerful; = earth-shaking, adj. 2.

figurative. Of great importance or consequence; earth-shattering.

Of colossal importance or consequence; momentous. Frequently in hyperbolic use.

More widely: having a high position or status; senior, important.

Of considerable size, length, etc.; big; significant.

Chiefly attributive. In extended use: of the highest rank; professional; serious, important, impressive. Cf. earlier big league, adj. 2.

Of great importance; powerful, impressive. Frequently in hyperbolic use.

That finally decides between two rival hypotheses, proving the one and disproving the other; more loosely, relating to, or adapted to lead to such…