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Synonyms

postulate, premise, presumption, supposition; also hypothesis, proposition, theory, thesis

as·sur·ance noun 1 : PLEDGE

2 chiefly British : INSURANCE

3 : the state of being assured: as

a : SECURITY

b : a being certain in the mind

c : confidence of mind or manner; also : excessive self-confidence

Synonyms

[3b] certainty, certitude, confidence, conviction, positiveness, sureness—more at CONFIDENCE

[3c] aplomb, confidence, self-assurance, self-confidence, self-esteem—more at CONFIDENCE

as·sure verb as·sured; as·sur·ing 1 : to make safe

2 : to give confidence to

3 : to state confidently to

4 : to make certain the coming or attainment of

Synonyms

cinch, ensure, guarantee, guaranty, insure, secure—more at ENSURE

1assured adjective 1 : sure of oneself

2 : satisfied as to the certainty or truth of a matter

Synonyms

[1] confident, secure, self-assured, self-confident—more at CONFIDENT

[2] certain, clear, cocksure, confident, doubtless, positive, sanguine, sure—more at CERTAIN

2assured noun, plural assured or assureds : INSURED

as·ta·tine noun : an unstable radioactive chemical element

as·ter noun : any of various mostly fall-blooming leafy-stemmed composite herbs with daisylike purple, white, pink, or yellow flower heads

as·ter·isk noun [ORIGIN: L asteriscus, fr. Gk asteriskos, lit., little star, dim. of astēr star]

: a character * used as a reference mark or as an indication of the omission of letters or words

astern adverb or adjective 1 : in, at, or toward the stern

2 : BACKWARD

as·ter·oid noun : any of the numerous small celestial bodies found esp. between Mars and Jupiter

asth·ma noun : a chronic lung disorder marked by recurrent episodes of labored breathing, a feeling of tightness in the chest, and coughing

— asth·mat·ic adjective or noun

as though conjunction : as it would be or as one would do if : AS IF

astig·ma·tism noun : a defect in a lens or an eye causing improper focusing

— as·tig·mat·ic adjective

astir adjective 1 : exhibiting activity

2 : being out of bed

Synonyms

alive, animated, busy, lively, vibrant—more at ALIVE

as to preposition 1 : ABOUT, CONCERNING

2 : ACCORDING TO

as·ton·ish verb : to strike with sudden and usu. great wonder : AMAZE

Synonyms

amaze, astound, bowl, dumbfound, flabbergast, floor, shock, startle, stun, stupefy, surprise—more at SURPRISE

as·ton·ish·ing adjective : causing astonishment : SURPRISING

— as·ton·ish·ing·ly adverb

Synonyms

amazing, astounding, eye-opening, shocking, startling, stunning, surprising—more at SURPRISING

as·ton·ish·ment noun : the state of being astonished

Synonyms

admiration, amazement, awe, wonder, wonderment—more at WONDER

as·tound verb : to fill with bewilderment or wonder

— as·tound·ing·ly adverb

Synonyms

amaze, astonish, bowl, dumbfound, flabbergast, floor, shock, startle, stun, stupefy, surprise—more at SURPRISE

as·tound·ing adjective : causing astonishment or amazement

Synonyms

amazing, astonishing, awesome, fabulous, marvelous, prodigious, stunning, stupendous, surprising, wonderful—more at MARVELOUS

1astraddle adverb : on or above and extending onto both sides

2astraddle preposition : ASTRIDE

as·tra·khan noun, often cap 1 : karakul of Russian origin

2 : a cloth with a usu. wool, curled, and looped pile resembling karakul

as·tral adjective : of, relating to, or coming from the stars

Synonyms

star, starry, stellar—more at STELLAR

astray adverb or adjective 1 : off the right path or route

2 : into error

Synonyms

afield, amiss, awry, wrong—more at WRONG

1astride adverb 1 : with one leg on each side

2 : with legs apart

2astride preposition : with one leg on each side of

1astringent adjective : able or tending to shrink body tissues

— as·trin·gen·cy noun

2astringent noun : an astringent agent or substance

astrol abbreviation astrologer; astrology

as·tro·labe noun : an instrument