noun

1. A sticky note, such as a post-it note.

   “Her desk is covered with yellow stickies.”

2. A discussion thread fixed at the top of the list of topics or threads so as to keep it in view.

3. A small adhesive particle found in wastepaper.

verb

1. (bulletin boards) to fix a thread at the top of the list of topics or threads so as to keep it in view.

adjective

1. Able or likely to stick.

   “Is this tape sticky enough to stay on that surface?”

2. Potentially difficult to escape from.

   “This is a sticky situation. We could be in this for weeks if we're not careful.”

3. Of weather, hot and windless and with high humidity, so that people feel sticky from sweating.

Synonyms: claggy, tenacious, close, muggy, sultry