Definition from Wiktionary, the free dictionary
Etymology 1 
From papa 'dad'
- (informal, usually as a form of address) Father, dad.
- Hey, pops, I'm home.
- By extension, another man old enough to be the speaker's father.
Etymology 2 
- Plural form of pop (the sound and related meanings)
- Third-person singular simple present indicative form of pop.
- masculine plural of pop