what does this symbol mean?

Symbols with squares and rectangles

Boxes, frames and panels.

Laundry symbols 6 symbols

Dashboard warning lights 4 symbols

Blueprint symbols 4 symbols

Blueprint symbols 7 symbols

Road signs 9 symbols

US state flags 5 symbols

OBD-II trouble codes 30 symbols

European flags 35 symbols

African flags 39 symbols

Asian flags 41 symbols

More symbols 423 symbols