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astern behind a boat or aircraft. [2 definitions]
asteroid any of thousands of celestial bodies with diameters between one and five hundred miles that revolve around the sun in orbits that lie mostly between the orbits of Jupiter and Mars; planetoid.
as the crow flies in the straightest route.
asthenia loss or lack of physical strength; weakness; debility.
asthma a chronic respiratory disorder characterized by labored breathing, wheezing, and a feeling of tightness in the chest, often caused by an allergy.
asthmatic suffering from asthma. [3 definitions]
as though as if.
astigmatic pertaining to or having astigmatism. [3 definitions]
astigmatism an irregularity in the curvature of a lens, including that of the eye, that prevents rays of light from meeting in a single focal point, resulting in an indistinct or distorted image. [2 definitions]
astilbe any plant of the genus Astilbe, having small red, white, or pink flowers.
astir in action; moving. [2 definitions]
as to with regard to; concerning. [2 definitions]
astonish to fill, suddenly, with great surprise or amazement.
astonishing extremely surprising or amazing.
astonishment great surprise or amazement.
astound to overcome with surprise, awe, or wonder; amaze.
astounding causing tremendous surprise or wonder; extremely amazing.
astraddle having one leg on each side; astride.
astrakhan a lustrous curly or wavy fur made from the pelts of young lambs. [2 definitions]
astral of, concerning, emanating from, or resembling the stars; stellar. [2 definitions]
astray off the right or known path or course. [2 definitions]