Definition of "iconic"

For younger musicians, Coltrane’s death became one of those iconic events that stays vividly in the mind.

1983, J. K. Chambers, Milestones, New York: Beech Tree Books, page 111

She angrily turned, giving me my favorite view, that iconic view of a woman from the rear.

1986, John Updike, Roger's Version, New York: Alfred A. Knopf, page 306

In time The Simpsons would, indeed, resort to spoofing such decidedly non-spooktacular fare like E.T and Mr. And Mrs. Smith (both in “Treehouse Of Horror XVIII”) but in 1992 the field was wide-open and the show could cherry-pick the most iconic and beloved fright fare of all time.

2012 April 29, Nathan Rabin, “TV: Review: THE SIMPSONS (CLASSIC): “Treehouse of Horror III” (season 4, episode 5; originally aired 10/29/1992)”, in (Please provide the book title or journal name)‎

"We did look at building a new bridge, but this is an iconic structure," says Network Rail Project Manager Michael Bryan.

2020 August 12, Andrew Mourant, “The tide is turning for a Victorian wonder”, in Rail, page 50

A portrait of a person is to a considerable extent iconic, but is not completely so since the painted canvas does not have the texture of the skin, or the capacities for speech and motion, […]

1955 , Charles William Morris, Signs, Language, and Behavior, G. Braziller, page 23