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as·trol·o·gy noun : divination based on the supposed influence of the stars upon human events

— as·trol·o·ger noun

— as·tro·log·i·cal adjective

astron abbreviation astronomer; astronomy

as·tro·naut noun : a traveler in a spacecraft

as·tro·nau·tics noun : the science of the construction and operation of spacecraft

— as·tro·nau·tic or as·tro·nau·ti·cal adjective

as·tro·nom·i·cal also as·tro·nom·ic adjective 1 : of or relating to astronomy

2 : extremely large

Synonyms

colossal, enormous, giant, gigantic, huge, prodigious, titanic, tremendous, whopping—more at HUGE

astronomical unit noun : a unit of length used in astronomy equal to the mean distance of the earth from the sun or about 93 million miles (150 million kilometers)

as·tron·o·my noun, plural -mies : the science of objects and matter beyond the earth's atmosphere

— as·tron·o·mer noun

as·tro·phys·ics noun : astronomy dealing esp. with the physical properties and dynamic processes of celestial objects

— as·tro·phys·i·cal adjective

— as·tro·phys·i·cist noun

as·tute adjective [ORIGIN: L astutus, fr. astus craft]

: shrewdly discerning; also : WILY

— as·tute·ly adverb

— as·tute·ness noun

Synonyms

canny, hardheaded, knowing, sharp, shrewd, smart, wily—more at SHREWD

asun·der adverb or adjective 1 : into separate pieces

2 : separated in position from each other

ASV abbreviation American Standard Version

1as well as conjunction : and in addition : and moreover

2as well as preposition : in addition to : BESIDES

asy·lum noun [ORIGIN: ME, fr. L, fr. Gk asylon, neut. of asylos inviolable, fr. a- not + sylon right of seizure]

1 : a place of refuge

2 : protection given to esp. political fugitives

3 : an institution for the care of the needy or sick and esp. of the insane

Synonyms

harbor, haven, refuge, retreat, sanctuary, shelter—more at SHELTER

asym·met·ri·cal or asym·met·ric adjective : not symmetrical

— asym·me·try noun

as·ymp·tote noun : a straight line that is associated with a curve and tends to approximate it along an infinite branch

— as·ymp·tot·ic adjective

— as·ymp·tot·i·cal·ly adverb

at preposition 1 — used to indicate a point in time or space

2 — used to indicate a goal

3 — used to indicate position or condition <~ rest>

4 — used to indicate means, cause, or manner

At symbol astatine

AT abbreviation automatic transmission

at all adverb : in any way : in any circumstances

at·a·vism noun : appearance in an individual of a character typical of an ancestral form; also : such an individual or character

— at·a·vis·tic adjective

atax·ia noun : an inability to coordinate muscular movements

ate past of EAT

1-ate noun suffix 1 : one acted upon (in a specified way)

2 : chemical compound or complex derived from a (specified) compound or element

2-ate noun suffix 1 : office : function : rank : group of persons holding a (specified) office or rank

2 : state : dominion : jurisdiction

3-ate adjective suffix 1 : acted on (in a specified way) : being in a (specified) state

2 : marked by having

4-ate verb suffix 1 : cause to be modified or affected by : cause to become

2 : furnish with

ate·lier noun 1 : an artist's or designer's studio

2 : WORKSHOP

athe·ist noun : one who denies the existence of God

— athe·ism noun

— athe·is·tic adjective

ath·e·nae·um or ath·e·ne·um noun : LIBRARY 1

ath·ero·scle·ro·sis noun : arteriosclerosis characterized by the deposition of fatty substances in and the hardening of the inner layer of the arteries

— ath·ero·scle·rot·ic adjective

athirst adjective 1 archaic : THIRSTY

2 : having a strong eager desire

Synonyms