Definitions for "Safe seat"
A division in which the same party has won each election for a long period of time, and the winning candidate receives more than 60% of the vote.
A constituency in which the holding party has a big lead to defend. Often regarded as being a margin of 15-20% or more.
An electorate in which the support for a Member or Party is such that the Member or representative of that Party is very likely to be elected.