\begin{definition}[Definition:Imperial/Volume/Peck]
The '''peck''' is an imperial unit of volume.
{{begin-eqn}}
{{eqn | o = 
      | r = 1
      | c = '''peck'''
}}
{{eqn | r = 2
      | c = (imperial) gallons
}}
{{eqn | r = 9 \cdotp 09218
      | c = litres
}}
{{end-eqn}}
\end{definition}