Is there a way to simplify the following newtheorem environment
\newtheorem{definition}[theorem]{Definition}
instead of using it as follows
\begin{definiton}[xxx]
yyy
\end{definiton}
is it possible to use it as follows
\definiton[xxx]{
yyy
}
\begin
and\end
tags are much more prominent than just\definition{
and}
(particularly for the end).