senior /sēˈnyər or sēˈni-ər/

1. Elder
2. Older or higher in standing
3. More advanced
4. First

1. A person who is senior
2. A pupil in the senior part of a school
3. A fourth-year student at college (US)

seniority /sē-ni-orˈi-ti/ noun

1. The state or fact of being senior
2. Priority by age, time of service, or standing
3. A body of seniors or senior fellows

senior citizen noun

An old-age pensioner

senior common room or (Cambridge University) senior combination room noun

In some universities, a common room for the use of staff (cf junior common room, middle common room; abbrev SCR)

senior moment noun (informal)

A momentary lapse in memory, esp experienced by an older person

senior optime see optime

senior service noun

The Royal Navy

• sustainability
• sustainable
• sustained
• sustainedly
• sustained yield
• sustained yields
• sustainer
• sustainers
• sustaining
• sustaining pedal
• sustaining pedals
• sustainings
• sustainment
• sustainments
• sustains
• sustenance
• sustenances
• sustentacula
• sustentacular
• sustentaculum
• sustentaculums
• sustentate
• sustentated
• sustentates
• sustentating