two 
(t)
(t)n.
Idiom: 1. The cardinal number equal to the sum of 1 + 1.
2. The second in a set or sequence.
3. Something having two parts, units, or members, especially a playing card, the face of a die, or a domino with two pips.
4. A two-dollar bill.
in two
Into two separate parts; in half: cut the sandwich in two.
[Middle English, from Old English twā; see dwo- in the Appendix of Indo-European roots.]
two adj. & pron.