Of a person: greatest in respect of power, authority, importance, or consequence. Formerly frequently (chiefly Scottish) in most master n. a ruler…

Most notable or prominent, best, chief. Also more emphatically first and foremost: = first, adj. 1a.

Applied to people.

Chief, principal; capital; (of a sin) deadly (deadly, adj. 5a).

Nearest to, or adjacent to (a person, thing, etc.), in character, condition, rank, etc. Obsolete.

Scottish. Most important or prominent. ? Obsolete.

Of the highest rank or importance; principal, chief.

That possesses the most authority; holding the most senior position. Cf. head, n.1 34.

Foremost, chief; prevailing, predominant.

Principal, foremost, chief. Obsolete.

Of a thing: main, principal, chief. Now rare.

figurative. In of the first magnitude, of the greatest importance; outstanding. Similarly, of the second (third,etc.) magnitude. Cf. first, adj. 1a.

That bears or is worthy to bear the palm (palm, n.1 2b); holding the first or highest place; pre-eminent; excellent.

First in rank, order, or quality; principal, chief, most eminent, best; of high standing. See also top people, n.

Of the greater weight, importance, or influence; heavier or heaviest; overwhelming. Cf. preponder, v.1 2.

Most prominent or important, chief. Cf. foremost, adj. 4.

Adjoining or in close proximity to one's home, or the principal building on a farm or estate. Cf. home station n. (a) at compounds 2.

That involves or is regarded as involving life and death; (by extension) extremely urgent or dangerous; vitally important. Cf. a matter of life and…

= palmary, adj.1

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

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

First in importance or position; foremost, leading; outstanding. Cf. premier, adj. 1a.