’til (t?l) prepinformal a variant form of till11Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014til (t?l, til) also teel n. the sesame plant. [1830?40;