noun
Abbreviation of コミュニケーション, used in compounds such as コミュ力 (communication skills) or コミュ障 (communication disorder). Not used as a standalone word.
彼はコミュ力が高くて、誰とでもすぐ仲良くなる。
He has great communication skills and quickly becomes friends with anyone.
「コミュ障」は、人付き合いが苦手
noun
Abbreviation of コミュニティー, used in compounds such as オンラインコミュ (online community). Less common than the communication sense.
See also: コミュニティー
このゲームのコミュはとても活発だ。
The community for this game is very active.
コミュ障 is a slang term for being bad at socializing.