Troi and Riker held a conversation about the term and their relationship on the holodeck during a visit from Lwaxana Troi to the Enterprise-D. It was then stated imzadi could be used as well for platonic and for physical love. (TNG: "Haven")
While being telepathically violated, Troi flashed back to a conversation with Riker where they discussed being in a relationship while on the same ship. She kept flashing back to this memory, but with Riker's role being replaced by Jev and then Tarmin. (TNG: "Violations")
After playing the trombone for Troi, Riker stated "I knew that I could count on my imzadi – the ship's counselor – to improve my self image." (TNG: "Thine Own Self")
In the Peter DavidnovelsImzadi and Triangle: Imzadi II, it was revealed that "imzadi" most basically translates as "first", although Troi clarifies that this term signifies the first person with whom one has shared not only physical intimacy, but spiritual as well. At the conclusion of Triangle, Worf refers to the recently-deceased Jadzia Dax as his Imzadi, recognising that the word defines their bond even if it does not originate from their cultures.