As a formal adjective, just means fair.  

Example:  The result of the murder trial was just.


As an adverb,
just has many uses:


Recently In the Past
I just arrived.
The game has just started.

Only
I just need $5.
I’m just a kid. I can’t lift something so big.

Exactly
You look just like your sister.
This is just what I needed.

A Small Amount, A Little, Barely
We have just enough glasses for the guests.
We just missed that other car.

Almost (with about)
It is just about time to start the music.
We were just about to begin class.

Imperatives
Just Do It.
Just wait here please.



Songs
Just Dance
Lady Gaga
I'm Just a Girl
No Doubt
I Just Called
Stevie Wonder
Jut The Two of Us
BillWithers
Just
Radiohead
The Party's Just
Begun
Cheetah Girls
Just the Way You
Are
Billy Joel
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Just