The act of loading cargo or freight; the loading process onto trucks, ships, containers, etc.
今朝は倉庫で積み込み作業が早く終わった。
This morning the loading work at the warehouse finished early.
積み込みの際は荷崩れしないように注意してください。
Please be careful during loading so the cargo doesn't shift or collapse.
トラックへの積み込みは明日の朝行います。
The loading onto the truck will be done tomorrow morning.
In mahjong, the act of stacking or arranging the wall/tiles in a way that benefits oneself; a specialized term within the game.
彼は積み込みがうまくて、良い手を作るのが速い。
He's good at arranging the wall and quickly builds strong hands.
大会では不正な積み込みが問題になった。
At the tournament, improper tile arranging (stacking) became an issue.