1. the position or office of being a senator
2. the period of time during which someone serves as a senator

Examples

• She announced her candidacy for the U.S. senatorship.
• His senatorship lasted twelve years before he retired.
• The vacant senatorship will be filled by special election.
• During her senatorship, she focused on education reform.
• He gave up his senatorship to run for president.
• The senatorship comes with significant responsibilities.