MARV is independent from MIRV.
MIRV means a missile bus carries multiple warheads and can be launched independently. And MARV means the warheads themselves are maneuverable after launch, thereby capable of performing evasive maneuvers during the terminal stage.
The ABM Treaty prevented the need for MARV warheads on MIRV-capable missiles. You can see from images that US and SU warheads lack fins. I believe the M45 also carried non-maneuvering warheads with a similar shape as American warheads. I guess the French kept to the spirit of the treaty until 2002 and then created MARV waheads once it ended. The Russians also introduced MARV on Yars and Bulava. Rubezh is used to carry Avangard. It's unclear if Sentinel will come with MARV warheads.
Glide vehicles never leave the atmpshere and use horizontal flight. So these are not MARVs, 'cause they never perform "reentry."
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