1.
If you have something at your ~, you are able to use it whenever you want, and for whatever purpose you want. If you say that you are at someone’s ~, you mean that you are willing to help them in any way you can.
Do you have this information at your ~?...
If I can be of service, I am at your ~.
PHRASE: usu PHR after v, v-link PHR
2.
Disposal is the act of getting rid of something that is no longer wanted or needed.
...methods for the permanent ~ of radioactive wastes.
N-UNCOUNT: oft n N, N of n