Currently we need to write this :

#+ATTR_LATEX: :options [title of definition]
#+begin_definition
This is a definition.
#+end_definition

to get this with the LaTeX exporter :

\begin{definition}[title of definition]
This is a definition.
\end{definition}

I was wondering if something like this is possible :

#+begin_definition :options [title of definition]
This is a definition.
#+end_definition

Generally speaking, the rest of the line with #+begin_... could be
considered as an implicit #+ATTR_HTML for this environment.

Is it something doable ?

-- 
Fabrice