You included the intent of the artist in your defnition.
And you could have said at least one person in the audience.
Maybe you didn't mean that then.
I'm still working on my definition.

This debate might help.
Yoko Ono is regarded as an artist and was performing in an artistic context. Having that information, the fact that Yoko Ono was doing a performance and not just farting or cooking a fried egg (not that Yoko Ono wouldn't make something artistic out of it) and the fact that it had an audience made me conclude that it is, in fact, art. With this, I had enough and, as you imply, maybe even too much to reach this conclusion.
When you asked me, it made me think and I had to discard the intent of the artist. The possibility that someone creates or performs something without consciously thinking about it as art while on the other hand an audience or public do consider it art is quite conceivable. In fact, I highly doubt that the concept of art is universal. Did people think about their paintings as art in prehistory? Yet we call it prehistoric art.
The number of people who consider something art is relevant to its meaning though. Just for the sake of communication, it is. Social context is also relevant. I would give more weigh to assertions on whether something is art or not in an art gallery than in a football stadium.

Masters of the pure note!
Meh... not that I dislike them, but I prefer other more dynamic groups from the same generation, especially performing live.
Then you're saying her performance was not deliberate?
No. Her performance wasn't based on a deliberate choice of musical notes.
Melodically, it wasn't deliberate. Very possibly it was deliberately non melodic.
Random noise doesn't have a beginning. It just starts. Random noise doesn't have an end. It just stops. Random noise doesn't progress. It just continues. That's the difference I was referring to.
Something that has a beginning, starts; something that has an end, stops. I don't have much else to say, except that I'm aware that Yoko Ono is a conscious being who can choose when to start and when to stop. Any human can choose a beginning and an end to whatever they feel like doing, and this obvious fact is irrelevant to what we call art or the value of an art work.
Fair enough. I didn't listen more than once either.
On the other hand, I do own pieces of mucic that I did not like initially but which grew on me with repeated listening. My first purchase of a Jethro Tull album based on having heard a single song from it was a shocker at first. I now own all their recordings and their are still some song that I don't like the sound of but that I like listening to, if that makes sense to you?
I actually had a shirt done with the "Aqualung" cover some years ago. In fact, I even went to a Jethro Tull concert. I hated it. I still like their old material though.
Well, in my opinion, what is important is to be natural about it. It would be stupid of me to listen carefully several times to the Yoko Ono performance to try to "get it" or go back to it a year after to see if I have developed my taste to the extent of being able to enjoy it, and if not, try again the next year. Or even worse: pretend that I get it and that I enjoy it just to fit in. This happens quite often because art, unlike calculus, doesn't need to be explained.
I honestly have reached a conclusion about Yoko Ono's performance. After all, possibly it's not about another listen, but about another thought. I, like you, believe her performance is more an intellectual thing, but I'm not interested in the intellectual content of her performance, whatever it is. I think her performance is plain rubbish. If some day I change my mind regarding this performance, that would mean that I've had an important revelation, not just a change of appreciation.
I agree. I was just making a distinction between low and high quality art. Though I now realise I was talking just about technigue or use of technigue. Soime art doesn't require must expertise in this area, other Art does.
Art is an evasive concept. We can try to have a rational approach to this semantic debate, but I think the concept is not entirely rational because it doesn't have clearly defined boundaries. The concept has evolved from its more concise original meaning, and is still evolving. All I know is it relates to works of aesthetic value, and I'm not even that sure about this.
Can you think about an informative description of what we can objectively say constitutes art?