Definition of "prognosticator"

Thou art wearied in the multitude of thy counsels: let now the astrologers, the starre-gazers, the monethly prognosticators stand vp, and saue thee from these things that shall come vpon thee.

1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], Isaiah 47:13

When the staccato, Neptunes-ian single “Boyfriend” was released in March, musical prognosticators were quick to peg the album it portended, Believe, as Justin Bieber’s Justified, a grown-and-sexy, R&B-centric departure that evolved millennial teenybopper Justin Timberlake into one of the unifying pop-music figures of the aughts.

2012 June 26, Genevieve Koski, “Music: Reviews: Justin Bieber: Believe”, in The A.V. Club‎, archived from the original on 6 August 2020

On Long Bets, a website where prognosticators test their mettle by playing for real (or at least proceeds-donated-to-charity) stakes, there is an open bet between the British astrophysicist Martin Rees, a noted worrier over apocalyptic possibilities, and Harvard University’s Steven Pinker, famous for his vaulting optimism.

2021 May 29, Ross Douthat, “Why the Lab Leak Theory Matters”, in The New York Times‎