pencil in什么意思?

草拟
pencil in sth/sb or pencil sth/sb in

to arrange for something to happen or for someone to do something on a particular date, knowing that the arrangement might be changed later

例子：
I'll pencil in the meeting for next Friday and confirm it later.

'Can you suggest someone who would speak at the conference?' 'Pencil in Barbara Glennon and I'll phone her to check.'