Ono was speaking as it was the anniversary of Lennon's death on December 8 and she gave an interview about her late husband to NME magazine.
She admitted that she has no plans to leave her New York home that she shared with Lennon before he was shot dead there by Mark Chapman in 1980.
She said: 'It is the home John and I created together. Every wall witnessed John. It is the only home Sean [their son] knows to be ours. How could we leave?'
Ono added that she believes Lennon 'would definitely be experimenting on some new music, using the computer' if he were still alive.
She added: 'I am sure it would be quite something.'