Overs are warnings that a signal has crossed the peak limit a meter is watching.
Definition
A clipping warning, not a tone description
A meter over usually means the signal exceeded a defined peak threshold. On a digital peak meter, that often means samples reached or passed 0 dBFS.
Some meters also show true-peak overs, which estimate overloads that can happen between samples after reconstruction or encoding.
Context
Not all overs mean the same thing
An internal floating-point channel can show red without permanent damage if the level is reduced before export. A fixed-point export or final master bus over is more serious.
True-peak overs matter for delivery because codecs and converters can clip even when sample peaks look acceptable.
Practice
Trace where the over happens
When a meter flags an over, find whether it is happening on a track, bus, plugin output, export, or final limiter. Fix the first place the overload becomes real.
Use true-peak metering on the final output so delivery overs are caught before upload.