Longman Dictionary of Contemporary English - ache

~1 v 1 if part of your body aches, you feel a continuous, but not very sharp pain there  (The noise of the traffic made my head ache. | an aching back) 2 ~ to do sth/for sth to want to do or have something very much  (I was aching to tell him the good news.) ~2 n 1 a continuous pain that is not sharp, for example the pain you feel after you have used part of your body too much  (After three days the ache in his legs had almost gone. | backache) dull ache (=an annoying ache that is not very painful)  (My hand started to hurt with a sort of dull ache.) aches and pains (=many small pains which you feel at the same time)  (Apart from the usual aches and pains, she felt all right.) 2 a strong feeling of wanting something - achy adj  (My arm feels all achy.)