ti·dy 
(tīdē)
(tīdē)adj. ti·di·er, ti·di·est
1.
a. Orderly and clean in appearance: keeps the apartment tidy.
b. Given to keeping things clean and in order: a tidy housekeeper.
2. Informal Adequate; satisfactory: a tidy arrangement.
3. Informal Substantial; considerable: a tidy sum.
v. ti·died, ti·dy·ing, ti·dies
v.tr.
To clean or put in order: tidied up the house.
v.intr.
To make things clean or orderly: tidied up after dinner.
n. pl. ti·dies
A decorative protective covering for the arms or headrest of a chair.
[Middle English tidi, in season, healthy, from tide, time; see TIDE1.]
tidi·ly adv.
tidi·ness n.