| on |
When we say the book is on the shelf, we mean that the shelf is where the book is and the shelf is holding up the book. [8 definitions] |
| once |
Once means one time. If you went to the beach only once last summer, then you went only one time. [3 definitions] |
| one |
One is the word for the number 1. [4 definitions] |
| ones place |
If we look at a number like 26, we say that the 6 is in the ones place. If we look at a number like 523, we say that the 3 is in the ones place. The idea of place helps us understand what digits in a big number mean. For example, we understand that the 2 in 26 doesn't really mean 2. It means 20. That's because it's in the "tens place," which is just to the left of the ones place. A number's place is its position in the way we write numbers. |
| onion |
An onion is a round vegetable with a strong taste and smell. People usually eat onions in small pieces mixed in with other foods. Onions grow under the ground. |
| online |
When you do something online, you do it using a computer that is connected to many other computers. |
| only |
If you only want to watch TV, then watching TV is the one thing you want to do, and you don't want to do anything else. If you only go swimming in the summer, then you don't go swimming at any other time of the year. [3 definitions] |
| on purpose |
If you did something on purpose, you did it because you wanted to do it and you decided to do it. It was not an accident. |
| Ontario |
Ontario is one of the ten provinces of Canada. A province is an area of land that is one part of a country. Each province has its own capital. |
| onto |
When one thing goes onto another thing, it goes from one place to the top or surface of something else. |
| open |
When something is open, like a door or a window, something can come through it. When something like a box or drawer is open, you can see the inside. You can put things in or take things out. When something is open, it is not closed or shut. [4 definitions] |
| opening |
An opening is a hole or empty space where something can get through. A window is an opening in a wall. |
| operate |
When you operate something, you make it run and you control it. We operate things like trucks, cars, electric tools, computers, and other machines. [3 definitions] |
| operation |
When a doctor does an operation, it means that the doctor opens a part of someone's body to fix something that is wrong with it. [3 definitions] |
| opinion |
An opinion is what you think about something or someone. |
| opossum |
An opossum is a small animal with gray fur, a pointed nose, and a long tail. It uses its long tail to hang from tree branches. A mother opossum carries her babies in a kind of pocket in her belly. Different kinds of opossums are found in Australia and North and South America. |
| 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. |