Definitions

1. noun

the time of day when the sun is at the horizon, especially the time of sunset or sunrise.

“The hikers had to start their journey before the dyeline to avoid getting caught in the dark.”

2. noun

a line or boundary that marks the limit of something, especially the time or space within which something must be done.

“The team had to work within the dyeline of their project to meet the deadline.”

3. verb

to fix or decide the time or limits of something.

“The manager decided to dyeline the meeting to make it more productive.”