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Plane usually means an airplane, a flat surface or a tool for shaving wood.
Plain usually means simple or an expanse of lowland.
The words plane
have several meanings. Unfortunately, both have a meaning relating to flatness, and this is often the source of confusion.
The word plain has several meanings:
Simple (i.e., not elaborate)
Also simple as in apparent
- It is
plain to see.
seems quite plain to me.
Plain is an adjective
in these examples.
An expanse of level and low land
joined the Chinese farmers as they attempted to drive the yaks across the
plain in western China.
Plain is a noun
in these examples.
The word plane has several meanings:
A flat surface
(especially in mathematics)
- What time is your plane?
A tool for smoothing or shaping wood
(i.e., a carpenter's plane)
- In a 3D space, a plane can be defined by specifying a point and a normal vector to the plane.
Also means a level (usually figurative).
- I was
hoping for a conversion on a higher plane.
Also the verb to plane (i.e., to shape wood)
To travel on the
surface of water
you plane a few inches off the top of the door?
car hit the puddle and planed straight into the back of the lorry.
(also known as to aquaplane)
Select the correct version:
Confusion arises mostly between plain meaning expanse of lowland and plane
meaning a flat surface or a level.
A plain (lowland) is always on the ground. A plane (a surface or a level) is nearly always above the ground...like an airplane.
Therefore, if it's above the ground, it's almost certainly plane.
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