| opportunity |
An opportunity is a chance to do something or to make something better. |
| opposite |
If things are opposite, they are as different as they can be. Happy and sad are opposite feelings. Fast and slow are opposite speeds. East and west are opposite directions. [4 definitions] |
| or |
When you can have ice cream or cake, it means that you have a choice between ice cream and cake. |
| orange |
An orange is a round, sweet fruit. We often drink the juice of oranges in the morning. Oranges grow on trees in warm places. [3 definitions] |
| orchard |
An orchard is a piece of land planted with trees that grow fruits or nuts. |
| orchestra |
A group of people who play music together on different instruments is called an orchestra. Very often, an orchestra is large and includes many people who play violins and other instruments with strings. |
| order |
An order is a way that a group of things are put together. When we count, we always say numbers in a certain order. We say "one, two, three, four, five." We never say something like "three, five, one, two, four" when we count. When things are in an order, we can see some pattern or reason that things are put together in a certain way. [3 definitions] |
| ordinary |
Ordinary means usual or normal. If your ordinary way of walking is fast, then walking fast is normal for you. It is what you usually do. When something is not ordinary, it is may be strange or different. |
| Oregon |
Oregon is one of the fifty states that make up the United States of America. A short way to write Oregon is OR. |
| organization |
When your desk has organization, it means that your desk is in order. Everything is arranged in a way that is neat and makes sense. [2 definitions] |
| organize |
When you organize your room, it means that you put your room in order or arrange it in a certain way. |
| Orinoco River |
The Orinoco River is a long and important river in South America. It is mostly in the country of Venezuela. It flows across Venezuela in the south and then flows along the border between Venezuela and Colombia. Finally, it flows into the Atlantic Ocean. |
| ornament |
An ornament is something you put on something else to make it prettier to look at. |
| ostrich |
An ostrich is a large, powerful bird that can run very fast but cannot fly. It has two toes on each foot and no feathers on its long legs and neck. Wild ostriches are found in Africa, but they live on farms in other parts of the world too. |
| other |
If your mom wants you to wear certain clothes, but you want to wear other clothes, it means that you want to wear different ones. [4 definitions] |
| otter |
An otter is a mammal with thick brown fur, a long body, flat tail, and short legs. Otters live mostly in water, and they eat fish, frogs, and other water animals. Different kinds of otters are found in most parts of the world. |
| ouch |
Ouch is a word that sometimes comes out of our mouths when we suddenly feel some pain. If a bee stings you, you might say OUCH!! |
| ought |
If you think that rich people ought to help poor people, it means that you think that helping poor people is the right thing for rich people to do. [2 definitions] |
| ounce1 |
An ounce is a certain amount of weight. When something weighs one ounce, it is not heavy at all. A letter from your mailbox usually weighs one ounce or less. Sixteen ounces equals one pound. A short way of writing ounce or ounces is oz. [2 definitions] |
| our |
When you say "our house," you mean the house that belongs to you and your family. If you and your sister shared a room, you would call it "our room." |
| ours |
If you say "this table is ours," you mean this table is the one that belongs to you and other people. |