Join up
verb
To become a member of a group or organization, especially the military.
He decided to join up with the army.

Often appears as...
- join up with
- join up for
verb
To unite or connect pieces together.
You need to join up the dots to complete the picture.

Often appears as...
- join up the dots
- join up pieces
verb
To become a member of a group or organization, especially the military.
He decided to join up with the army.

Often appears as...
- join up with
- join up for
verb
To unite or connect pieces together.
You need to join up the dots to complete the picture.

Often appears as...
- join up the dots
- join up pieces
Definition 1 of 2

Group Affiliation
Use 'join up' to express initiating membership with a new group, often implying active participation.

She chose to join up with the community choir.
Militaristic Origins
'Join up' originated from military context but can be used for other organized groups.

After college, he plans to join up with the Peace Corps.
Informal Tone
'Join up' is conversational and might not always fit formal writing or speech.

Let's join up with the others at the park.
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