Englishfor English speakers
four
Determiner
—
(ordinal fourth) The number 4. Four is one more than three and one less than five.
We have four fingers and one thumb on each hand.
four
Noun
—
The number 4.
Two and two is four.
layer
Noun
—
A layer is a covering material or substance.
When we got up in the morning, everything was covered by a thin layer of snow.
The cream forms a germ-fighting layer over the skin.
How many layers of clothing do you have to wear in the winter?
—
A layer is a level in an organisation.
The company is trying to reduce the number of management layers.
—
A layer is a person who lays something, (e.g., carpet, bricks, etc.).
—
A layer is a chicken kept to lay eggs.
layer
Verb
—
If you layer something, you make layers.
Layer the pasta in an ovenproof dish with the tomatoes, bacon and peas, seasoning each layer.
device
Noun
—
A device is a small machine or tool.
She has a device in her kitchen for cutting garlic.
—
A device is a machine or part attached to a computer, such as a keyboard, mouse, printer etc.
The mouse is an important device for using the computer.
—
A device is a clever way of doing something.
—
A device is a logo.