聚會或飯局上低頭看手機原本是不禮貌的行為，但是隨著越來越多人開始享受這種人群中的“獨處”，社交時間也慢慢被“矩形時間”所蠶食。

Rectangle time is the time of day when people in an obviously social setting instead choose to pull out their smart phones and have some time alone with their "rectangle". The term can also apply to other electronics, such as computers, iPads, etc.
“矩形時間”指人們在社交場合選擇拿出智能手機，和自己的“矩形”獨處的時間。“矩形時間”這一短語也可以應用于其他電子產品，如電腦、iPad等。

Example:

"Having some rectangle time there, I see," she said to Luke, as he stared at the phone screen while sitting on a scenic beach.
“原來是在享受‘矩形時間’啊，”她對坐在風光優美的海灘上盯著手機屏幕的盧克說道。

（英文來源：Urban Dictionary 編輯：丹妮）