n. the time before it gets dark
She came out of her house at dusk.

n. a way of doing an activity by using special knowledge or skills
Every chef has their own technique for preparing food.

n. a set of instructions put into a computer so that it does particular tasks
There are many programs on his computer.

adj. involved in something
My parents are engaged in conversation.

adj. having a strong desire to do well or succeed in something
Coaches often give inspirational speeches to help athletes stay motivated.

v. to completely change something so that it is much better
The introduction of personal computers revolutionized the way people communicate with one another.

n. a school that teaches a particular subject, or trains people for a particular job
To join the police force, Maria had to go to a police academy.

n. a recorded sound
The audio of this video is really bad.

n. information needed to understand someone or something
I don''t know anything about her background.

adj. whole or complete; with nothing missing
The entire cake was eaten by the hungry children.