begin{table}[!ht]
centering
caption{Définitions des variables linguistiques}
begin{tabular}{ c c c c c c c c}
toprule
makecell{de} & makecell{ NB}& makecell{NM} & makecell{NS} & makecell{Z}
& makecell{PS}& makecell{PM} & makecell{PB}  \
midrule
NB &  Z & PS & PM & NB & NM & NS & Z\
NM &  NS & Z & PS & NM & NS & Z & PS\
NS &  NM & NS & Z & NS & Z & PS & PM\
Z &  NB & NM & NS & Z & PS & PM & PB\
PS &  NB & NB & NM & PS & PM & PB & PB\
PM &  NB & NB & NB & PM & PB & PB & PB\
PB &  NB & NB & NB & PB & PB & PB & PB\
bottomrule
end{tabular}
end{table}