Thanks for the reply.

> On 21 Apr 2016, at 1:18 pm, luigi scarso <luigi.scarso@gmail.com> wrote:
> 
> the title is in  a \vtop and not a \vbox, and its height is fixed to \strutht (and the depth to \strutdp)
> so basically the title is one line.

OK, I’ll do my best to stick to one line.

I guess it would be better to use a paragraphs or column environment for long labels but the ConTeXt is generated by pandoc, which writes 'definition lists' as \startdescription \stopdescription.