Definition of 'Record'
All of the fields.  For instance, here is an example of a record:
{name: D.W., favoritecolor: blue}

You can think of a record as a function from field (key) to value.  For instance, the above would correspond to a function $f$ defined by $f(\text{name})=\text{D.W.}$, $f(\text{favoritecolor})=\text{blue}$.