- 1to connect to a service or computer system using a telephone line Remote users dial in from various locations worldwide. The campaigners and volunteers dial into a conference call every Wednesday.
- 2(also be/get dialled in) (informal) to direct all your effort and attention on to what you are trying to achieve, so you perform as well as you can I think Szabo has been the key player so far. She's dialled in. Fassbender eventually dialled into the character of Macbeth when he got a new insight on his motivation.