supermassive
adjective
(of a black hole or star) having a mass in the range of millions or billions of times that of the sun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Examples from the Web for supermassive
Contemporary Examples of supermassive
The observable Universe contains around 100 billion large galaxies and a comparable number of supermassive black holes.
Would Endurance even be able to fly that close to a supermassive black hole without being disintegrated by the force of it?
Neil deGrasse Tyson Breaks Down ‘Interstellar’: Black Holes, Time Dilations, and Massive WavesMarlow Stern
November 11, 2014
The same principle appears to hold for supermassive black holes too.
Unlike a forest sustaining a small population of predators, most galaxies have only one supermassive black hole.
Did supermassive black holes like the one in M87 get that way by eating stars?