\begin{definition}[Definition:Imperial/Length/Foot]
The '''foot''' is an imperial unit of length.
The '''foot''' is the FPS base unit of length.
{{begin-eqn}}
{{eqn | o = 
      | r = 1
      | c = '''foot'''
}}
{{eqn | r = 12
      | c = inches
}}
{{eqn | r = 30.48
      | c = centimetres
}}
{{eqn | r = 0 \cdotp 3048
      | c = metres
}}
{{end-eqn}}
\end{definition}