to touch lightly, so as to produce a peculiar thrilling sensation, which commonly causes laughter, and a kind of spasm which become dengerous if too long protracted.-to please; to gratify; to make joyous.-to feel titillation.-to excite the sensation of titillation.-ticklish; easily tickled.-liable to change; uncertain; inconstant.-wavering, or liable to waver and fall at the slightest touch; unstable; easily overthrown.