Audio Glossary

Student View
Teacher View

Choose a Letter

| A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

List of Words for Letter 'O'

Click on to hear the word and definition

  • official document a document that contains information that has been agreed upon by one or more people or institutions
  • opinion a statement of feeling or belief that cannot be proven true or false
  • opportunity cost the alternatives that are given up because a particular choice was made
  • option a choice
  • Oregon Trail a route west used by pioneers in the 1840s
  • outline a written plan for organizing information about a subject


Published by Macmillan/McGraw-Hill, a division of the Educational and Professional Publishing Group of
The McGraw-Hill Companies, Inc., 1221 Avenue of the Americas, New York, New York 10020.
Copyright ©2006 Macmillan/McGraw-Hill. All rights reserved.

Please read our Terms of Use and Privacy Notice before you explore our Web site.