I googled "immediately" and clicked on the news section. This led me to the article
Ukraine, NATO Negotiations Should Begin Immediately: Lithuania in Newsweek. Now, NATO negotiations aren't simple, there are 30 member countries and Ukraine is in a state of war, and even if it was simple you still have to set up a meeting and coordinate. It is completely impossible to get something like this going quite literally with no time inbetween now and the start of negotiations, yet the article exists. 'Immediately' here can mean days, maybe even weeks.
According to the
National Library of Medicine, immediate hypersensitivity reactions are called immediate because they happen within 24 hours. If you instead want to do some
science experiments for kids, 'immediately' here means seconds or faster.
This is a longwinded way of saying that of course there's interpretation involved.