Real Dictionary

till
preposition: In spoken English and informal written English, till is often used instead of until.

till in American English 1
to work (land) in raising crops, as by plowing and fertilizing; cultivate
conjunction: to the time that or when; until
preposition: up to the time of; until

till in American English 2
a drawer or tray for keeping money
intransitive verb: to cultivate the soil
transitive verb: to labor, as by plowing or harrowing, upon (land) for the raising of crops; cultivate

till in American English 3
until
noun: a drawer, box, or the like, as in a shop or bank, in which money is kept

till in American English 4
unstratified, unsorted, glacial drift of clay, sand, boulders, and gravel
noun: glacial drift consisting of an unassorted mixure of clay, sand, gravel, and boulders

till in British English 2
to cultivate and work (land) for the raising of crops

till in British English 3
noun: a box, case, or drawer into which the money taken from customers is put, now usually part of a cash register

till in British English 4
noun: an unstratified glacial deposit consisting of rock fragments of various sizes. The most common is boulder clay