projection

Everyday

1. A projection is an image shown on a screen or wall by a projector. tree →
2. A projection is a guess about the future based on numbers now: a sales projection. tree →
3. A projection is a part that sticks out from something. tree →
4. (maths and geography) A map projection is a way of drawing the round Earth on a flat map. tree →
5. (psychology) Projection is blaming others for feelings you have yourself. tree →

In the lessons

In class the teacher uses a projector to make a projection on the board. In maths and data lessons projections predict future numbers. In geography, every flat map uses a projection and so stretches some places (on many world maps Greenland looks much bigger than it is).

Examples

• The projection on the wall was blurry. tree →
• The teacher adjusted the projection. tree →
• The projection says the town will grow. tree →
• A rock projection made a shelter. tree →
• The Mercator projection makes Greenland look huge. tree →
• Population projections help plan schools. tree →
• Voice projection helps actors be heard. tree →
• The film projection started late. tree →

Note

Countable. Verb: project (pro-JECT); noun «project» (PRO-ject) is a piece of work. A projection is an estimate, not a fact. In maths, «if it grows by 10 each year, the projection after 3 years is +30».