Definitions for "LALR"
LALR is a term taken from computer science parsing theory which means Look Ahead Left Right. It refers to a class of grammars that belongs in the LALR(1) category of descriptive power, greater than LR(0) but not quite as powerful as LR(1).
The class of context-free grammars that Bison (like most other parser generators) can handle; a subset of LR(1). See Mysterious Reduce/Reduce Conflicts.
(Look Ahead Left-Recursive parser): A common parser architecture. LALR parsers are used for most programming languages.