0 having become usual and generally accepted, or done in a way that is usual and generally accepted:
Even universal computer symbols require conventionalized knowledge that "save" looks like a floppy disk or "take a photo" looks like an old-school camera.
The interaction between doctor and patient evolved over centuries into a conventionalized social ritual.
Speakers tend not to use the irregular form when its conventionalized meaning conflicts with the meaning the speaker wants to convey.
If violence remains tolerated and justified within families, it becomes conventionalized, something normal and expected.
