If you say that something, usually something large, extends for a particular distance or extends from one place to another, you are indicating its size or position.

If an object extends from a surface or place, it sticks out from it.

If an event or activity extends over a period of time, it continues for that time.

If something extends to a group of people, things, or activities, it includes or affects them.

If you extend something, you make it longer or bigger.

If a piece of equipment or furniture extends, its length can be increased.

If you extend something, you make it last longer than before or end at a later date.

If you extend something to other people or things, you make it include or affect more people or things.

If someone extends their hand, they stretch out their arm and hand to shake hands with someone.