till

I UK [tɪl] / US conjunction, preposition **

Summary:

Till can be used in the following ways: - as a preposition (followed by a noun): I won't be back till late. - as a conjunction (connecting two clauses): James lived with his parents till he was twenty-five.
Get it right: till:
Till is less formal than until and is used mainly in speech and informal writing. In academic writing and professional reports, until is much more frequent:
Wrong: Our government used the death penalty as a deterrent till 1989.
Right: Our government used the death penalty as a deterrent until 1989.
Wrong: He published a prose work and a few poems, but did not achieve success till he turned to play writing.
Right: He published a prose work and a few poems, but did not achieve success until he turned to play writing. ➡ until

until: "Till" is less formal than "until" and is used less often in writing

You'll have to wait till tomorrow.

Just sit here till I come back.

II UK [tɪl] / US noun [countable]
Word forms "till":
singular till plural tills

a piece of equipment used in shops for adding up the amount of money that someone has to pay and for holding the money

•

be caught with your fingers/hand in the till — informal to be caught stealing money from the place where you work

III UK [tɪl] / US verb [transitive]
Word forms "till":
present tense I/you/we/they till he/she/it tills present participle tilling past tense tilled past participle tilled old-fashioned

to prepare land for putting crops in the ground so that they will grow there