past - noun

the time that has elapsed

a earlier period in someone's life (especially one that they have reason to keep secret)

a verb tense that expresses actions or states in the past

past - adjective

• earlier than the present time; no longer current
• of a person who has held and relinquished a position or office

past - adverb

• so as to pass a given point

past - thesaurus

by   preceding   retiring   yesteryear