witness
verb (used with object)
to see, hear, or know by personal presence and perception.
will have witnessed
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future perfectof witness.future perfect
Used to describe an action that will be fully completed or achieved by a specific point in the future.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Dr Mousely said this "aligns with a plateau of intelligence and personality" that many of us will have witnessed or experienced.
From BBC ● Nov. 25, 2025
Sir Simon Bowes-Lyon will have witnessed three coronations following the ceremony of King Charles III.
From BBC ● May 4, 2023
Anyone who’s seen a dog with puppies will have witnessed the brutality of the moment the mother loses interest.
From The Guardian ● Apr. 4, 2021
They played 51 times in all competitions and anyone who saw all those games will have witnessed 215 goals at 4.2 goals a game, and seen their team finish second in the league.
From The Guardian ● Jan. 18, 2013
Those who have visited the slate quarries of Cumberland and North Wales will have witnessed the phenomena to which I refer.
From The Glaciers of the Alps Being a narrative of excursions and ascents, etc. by John Tyndall
