to connect to a service or computer system using a phone line
Example:
- Remote users dial in from various locations worldwide.
- The campaigners and volunteers dial into a conference call every Wednesday.
to direct all your effort and attention on to what you are trying to achieve, so you perform as well as you can
Example:
- 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.