Count to 15 without a Government member posting! (Part 1)

[North]

0

[Galaxiel]

1

[Shibuya-Kanon]

2

[Galaxiel]

3

[Shibuya-Kanon]

4

[Welly]

5

[Shibuya-Kanon]

6

[Welly]

7

[Griffindor]

8

[njian0]

nin

[Welly]

10

[njian0]

ewevven

[Legend]

Zeroteen

[njian0]

oneteen

[Galaxiel]

…

Minus 18.

[Shibuya-Kanon]

3

[Welly]

4

[njian0]

…

 20.

Minus 15

[Galaxiel]

1+2+3

[njian0]

Someone give me the definition of 7