The canopy of heaven, the upper air, etc., regarded as covering the earth; the sky.

A cloud. Obsolete.

The expanse in which the sun, moon, and stars are seen, (esp. in earlier use) regarded as having the… In plural (now only with the). Originally esp…

The regions above; the heavens. Obsolete.

The expanse in which the sun, moon, and stars are seen, (esp. in earlier use) regarded as having the… In singular. Chiefly poetic after 17th cent.

The sky, upper regions; †in early use also, the air, atmosphere. Also plural, the (seven) heavens.

Air, sky, upper region. Obsolete.

The apparent arch or vault of heaven overhead; the sky, the firmament.

In plural. With the or occasionally other determiner. Chiefly poetic and literary.

The arch or vault of heaven overhead, in which the clouds and the stars appear; the sky or heavens. In modern use only poetic or rhetorical.

The sky or heaven.

The apparent outward limit of space, conceived as a hollow globe enclosing (and at all points equidistant from) the earth; the visible vault of…

plural. The skies, heavens, or clouds.

spec. Half of the celestial sphere; in early quots., esp. that half of the heavens seen above the horizon, the sky above us; in Astronomy, usually…

the over-arching canopy or vault of heaven. Cf. canopy, n. 2b, vault, n.1

Often rhetorically used in plural (also formerly in singular) for ‘the sky, the heavens’.

In singular. Without determiner.

The sky; ? also, the atmosphere. Obsolete.

= axis, n.1. poetically (transl. Latin axis): The pole of the heaven; the heaven, the sky. Obsolete.

The expanse of heaven, the sky. Obsolete.

poetic. The sky, the heavens. Now archaic and rare.

transferred. The celestial hemisphere within the horizon of any place.

The apparent concave surface formed by the sky. Chiefly poetic and usually with defining terms.

spec. Chiefly poetic. The vault of the sky; the firmament; = heaven, n. 1a. Frequently more fully round of heaven, celestial round, etc.

Also simply the cope.

figurative. The vault of heaven. Obsolete.

Applied to the ceiling of a room, in its relation to the apartment above. Also transferred of the sky.

esp. applied to the overhanging firmament.

In later usage, apparently, vaguely used for (a) vertex, height (as if confused with cop); (b) firmament, expanse.

concrete. Anything that is spread out; an expanse; esp. the expanse of heaven, the firmament.

The vault or sphere of the heavens; one of the celestial ‘spheres’ of older astronomy.

By the poets often applied to the vault of the sky or heavens, hell, etc. Cf. Latin convexum, -a.

spec. The vault of heaven.

= expanse, n.

Frequently with the. The sky; (also) the sea. Chiefly literary and poetic.

esp. in the expanse: the ‘firmament’. Cf. expansum, n.

(a) Scottish the banner of the craftsmen of Edinburgh; (b) figurative the sky.

The visible heavens; the firmament; the sky. Also: the whole extent of cosmic space.

Scottish, Irish English (northern), English regional (northern), and Manx English. The sky, the heavens. Cf. cloud, n. 3c.

An arch of a bridge; a section between two piers. Also transferred, the vault of the sky.

The sky, the firmament.