(LALR, Look ahead LR) A type of {LR parser} that can deal with more {context-free grammars} than SLR parsersBut less than LR[1] parsers. LALR parsers are popular Because they give a good trade-off Between the numBer of grammars they can deal with and the size of the parsing taBle required. Compiler compilers like yacc and Bison generate LALR parsers. Wikipedia . (2003-05-13)