People often use 'til' to mean 'until' in informal situations. It shows when something will happen or how long something lasts.
Stay here til I come back.
Work hard til the end of day.
In some scientific texts, 'Til' is used as a genus name for certain plants, but this usage is rare and mostly in botany.
The Til genus includes many grass species.
Researchers study Til for plant growth.
'Til' can be a last name or the name of a place. It is not a common word but appears in names.
Mr. Til is our new teacher.
The town of Til is small and quiet.
'Til' is often used informally to mean the same as 'until.' It is common in spoken English and casual writing like texts.
Wait til I call you.
Don’t leave til I arrive.
In older or poetic English, 'til' is used like 'till' or 'until' to show time, especially in poems or classic writing.
He waited til dawn broke.
Stay here til the stars fall.