pro·jec·tion

/prəˈʤɛkʃən/ noun, pl -tions

1 [count] : an estimate of what might happen in the future based on what is happening now

He gave a projection of future expenses.

2 [count] : something that sticks out from a surface

projections on the rock wall

3 [noncount] : the act or process of causing a picture, movie, etc., to appear on a surface

movie projection

projection equipment

4 [count] technical : a type of map or drawing which shows all the parts of something that is curved or solid (such as the earth) on a flat surface

a projection map

5 [noncount] : the act of speaking, singing, or producing sounds in a way that can be heard over a great distance

You need to work on voice/vocal projection.

sound projection

6 [noncount] psychology : the act of imagining that someone else has the same ideas, feelings, etc., that you have

An example of projection is when someone thinks that everyone hates them because they hate themselves.

7 [count] : something that is imagined or created from your ideas, thoughts, feelings, etc.

— often + of

The image that we have of strangers is often just a projection of our own fears and desires.