1 If two things touch, they are so close to each other that there is no space between them. -- 接する, 接触する
These two wires must not touch.
4 the ability to feel things by putting your hand on them -- 手触り, 触感
It was cold to the touch (= when I touched it).
5 to contact someone -- 連絡する, 連絡を取る
I’ve been trying to get in touch with her.