1. adjective
a) Able or likely to stick.
Is this tape sticky enough to stay on that surface?
b) Potentially difficult to escape from.
This is a sticky situation. We could be in this for weeks if were not careful.
2. noun
Her desk is covered with yellow stickies.
3. verb
to fix a thread at the top of the list of topics or threads so as to keep it in view.
Wikipedia foundation.