syn ‧ tax /ˈsɪntæks/ BrE AmE noun [uncountable] technical
[ Date: 1500-1600 ; Language: French ; Origin: syntaxe , from Late Latin syntaxis , from Greek , from syntassein 'to arrange together' , from syn- ( ⇨ ↑ syn- ) + tassein 'to arrange' ]
1 . the way words are arranged to form sentences or phrases, or the rules of grammar which control this
2 . the rules that describe how words and phrases are used in a computer language