on the side
phrase
1
: in addition to the main portion
2
: in addition to a principal occupation
3
: secretly outside of one's marriage or romantic relationship
seeing another woman on the side
Cite this Entry
“On the side.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/on%20the%20side. Accessed 19 Dec. 2025.
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Merriam-Webster unabridged
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