C9

Specified in ISO 269.

C9

1. (international standards) ISO 269 standard paper size of 40 mm × 57 mm (1.57 in × 2.24 in), with a surface area of 22.8 cm² (3.53 sq in).

From the esports company Cloud9, as its Overwatch division lost two games in a row in season 2 of the tournament Overwatch Apex by forgetting about the objective.

C9 (third-person singular simple present C9s or C9's, present participle C9ing or C9'ing, simple past and past participle C9d or C9ed or C9'd or C9'ed)

1. (video games) To lose a winnable game by forgetting about the objective or getting distracted from it.

C9 (plural C9s or C9's)

1. (video games) An instance of such a loss.

From 師奶 / 师奶 (si¹ naai^5-1), which is near homophonous to English C nine.

C9

1. (Hong Kong Cantonese, Internet slang) alternative form of 師奶 / 师奶 (si¹ naai^5-1)

• C6