V-Sync (vertical sync)
Also searched as: vsync · v-sync · vertical sync
What it means
The old fix for screen tearing: it holds each finished frame until the monitor is ready for it. It removes tearing but adds input lag, because frames sit in a queue waiting their turn.
More detail
On its own it's a trade you usually don't want for fast games. The modern move is to pair it with VRR (the monitor waiting for frames) plus an FPS cap a few frames below your refresh rate — then V-Sync only acts as a safety net and almost never adds the lag. See the sync stack.
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