a member of a senate
"The senator from Ohio proposed a new bill to increase funding for rural schools."
A member, normally elected, in the house or chamber of a legislature called a senate. The legislatures of the United States and Canada have senators.
"The new senator took her seat in the chamber after winning the election last month."
The title for someone who is elected to be a senator.
In plain English: A senator is an elected official who represents their state or district in the upper chamber of the US government.
"The senator introduced a new bill to help small business owners."
Usage: A senator is an elected representative who serves in one of two legislative chambers known as senates, such as those found in the US Congress or Canadian Parliament. This term specifically refers to members of these upper houses rather than representatives in single-chamber legislatures like the House of Commons.
The word senator comes from the Latin term senex, which means "old man." It entered English through the concept of a council of elders who held political power in ancient Rome.