If you fill a container or area, or if it fills, an amount of something enters it that is enough to make it full.

If something fills a space, it is so big, or there are such large quantities of it, that there is very little room left.

If you fill a crack or hole, you put a substance into it in order to make the surface smooth again.

If a sound, smell, or light fills a space, or the air, it is very strong or noticeable.

If something fills you with an emotion, or if an emotion fills you, you experience this emotion strongly.

If you fill a period of time with a particular activity, you spend the time in this way.

If something fills a need or a gap, it puts an end to this need or gap by existing or being active.

If something fills a role, position, or function, they have that role or position, or perform that function, often successfully.

If a company or organization fills a job vacancy, they choose someone to do the job. If someone fills a job vacancy, they accept a job that they have been offered.

If you fill yourself with food, you eat so much that you do not feel hungry.

A play, film, or performer that fills a theatre, concert hall, or cinema attracts a very large audience.

When a dentist fills someone's tooth, he or she puts a filling in it.

If you fill an order or a prescription, you provide the things that are asked for.

If you have had your fill of something, you have had enough of it, and do not want to experience it any more or do it any more.

If you fill in a form or other document requesting information, you write information in the spaces on it.

If you fill in a shape, you cover the area inside the lines with colour or shapes so that none of the background is showing.

If you fill someone in, you give them more details about something that you know about.

If you fill in for someone, you do the work or task that they normally do because they are unable to do it.

If you are filling in time, you are using time that is available by doing something that is not very important.

If you fill out a form or other document requesting information, you write information in the spaces on it.

If a fairly thin person fills out, they become fatter.

If you fill up or fill yourself up with food, you eat so much that you do not feel hungry.

A type of food that fills you up makes you feel that you have eaten a lot, even though you have only eaten a small amount.