- in DEFINE-SYNTAX and LET-SYNTAX, syntax means macro expander
- in SYNTAX and QUASISYNTAX, syntax means code
- in BEGIN-FOR-SYNTAX, syntax means compile-time (although it's debatable whether this use of syntax is really different from the first one)
There is a certain elegance in that, but in the end it's also a bit silly.
And it's problematic, as the (awesome) paper Languages as Libraries shows: because LET-SYNTAX is already taken to mean "locally bind a macro expander", they have to use WITH-SYNTAX to mean "locally bind a piece of code".
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