| astronomer |
a scientist who studies the universe beyond the earth. |
| asylum |
a place for the care of those who are not able to care for themselves, such as children without parents, people with mental illness, or the very old. [1/3 definitions] |
| atheist |
a person who believes that there is no god or gods. |
| athlete |
a person who participates in sports or other physical activities. |
| atlas |
(cap.) a giant in Greek mythology who had to support the heavens on his shoulders. [1/2 definitions] |
| attendant |
a person who serves another person. |
| auction |
a public sale at which things are sold to the people who offer the most money. [1/2 definitions] |
| Australian |
a person who was born in or is a citizen of Australia. [1/2 definitions] |
| authority |
(usually plural) people who have this right or power by law. [1/3 definitions] |
| aviator |
a person who flies an aircraft; pilot. |
| aye |
a vote of yes, or a voter who votes yes. [1/2 definitions] |
| Aztec |
a member of an Indian people who had an advanced civilization in central Mexico before Spain conquered it in 1519. |
| baby |
a person who behaves in a childish or immature way. [1/6 definitions] |
| babysitter |
a person who takes care of children when their parents are not with them. |
| bachelor |
a man who has not married. |
| bail1 |
money left with a court to make sure that a person who is set free after arrest will return for trial. [1/3 definitions] |
| baker |
a person who bakes. |
| ballot |
a piece of paper on which people who are voting enter their choices. [1/3 definitions] |
| bandit |
a robber who is often a member of a gang that robs people while they are travelling. |
| baptism |
a Christian ceremony in which someone who wishes to join the church is sprinkled with water or dipped in water. |
| batter3 |
the person who stands in to bat the ball in baseball, softball, or cricket. |