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I obtained a TeX "pre-built" file in order to write for my college, but it so happens that every time I call a definition environment (which is defined in the file), it is always in italic. I am not fond of this particular aesthetic. Is there some way I can change this? I know I can \emph things in order to return them to normal, but is there a more elegant way?

Werner
  • 603,163
Aloizio Macedo
  • 207

1 Answers1

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Redefine the \definiton macro which starts the environment:

\documentclass{article}
\newenvironment{definition}%% only for demo here
  {\itshape}
  {}
\begin{document}

\begin{definition}
Everything is in italic
\end{definition}

Redefine the environment (should be in the pramble)
\makeatletter
\g@addto@macro{\definition}{\upshape}
\makeatother

\begin{definition}
Everything is in upright
\end{definition}

\end{document}