Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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A1 abbreviation of "answer."
a1 the first letter of the English alphabet. [6 definitions]
A2 abbreviation of "ampere" or "amperes," a unit of electrical current that refers to the quantity of current that passes through a resistor of one ohm when a potential of one volt is applied, equal to one coulomb per second.
a2 any one of a group or kind. [3 definitions]
a3 in every or in each; for every or for each.
A3 abbreviation of "angstrom" or "angstroms," a unit of length equal to one hundred-millionth of a centimeter, used in measuring light waves.
a-1 on; at; into; to.
a-2 used as an intensifier. [3 definitions]
a.1 abbreviation of "acre" or "acres," a unit of area equal to 43,560 square feet or 4,047 square meters, used in measuring land.
a.2 abbreviation of "acceleration."