A relation of proximity to, or of presence in or
on, something; as, at the door; at your shop; at home;
at school; at hand; at sea and on land.
The relation of some state or condition; as,
at war; at peace; at ease; at your service;
at fault; at liberty; at risk; at
disadvantage.
The relation of some employment or action;
occupied with; as, at engraving; at husbandry; at
play; at work; at meat (eating); except at
puns.
The relation of a point or position in a series,
or of degree, rate, or value; as, with the thermometer at 80°
goods sold at a cheap price; a country estimated at 10,000
square miles; life is short at the longest.
The relations of time, age, or order; as,
at ten o'clock; at twenty-one; at once; at
first.
The relations of source, occasion, reason,
consequence, or effect; as, at the sight; at this news; merry
at anything; at this declaration; at his command; to
demand, require, receive, deserve, endure at your hands.
Relation of direction toward an object or end;
as, look at it; to point at one; to aim at a mark; to
throw, strike, shoot, wink, mock, laugh at any one.
In celebration of Noah Webster's Birthday (October 16, 2009), we have prepared an updated website. 
