1.without good reason;
one cannot say such things lightly
2.with few burdens;
experienced travellers travel light
3.with little weight or force;
she kissed him lightly on the forehead
4.indulging with temperance;
we eat lightly in the morning
5.with indifference or without dejection;
he took it lightly
6.in a small quantity or extent;
spread the margarine thinly over the meat
7.to a slight degree;
her speech is only lightly accented