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Related to depend on: depend upon
depend (up)on (someone or something)
1. To rely on someone or something. You can depend on Tom, so if he said he'd be here at 11:30, then he'll be here at 11:30. I still haven't found a job, so yes, I depend on my parents for money.
2. To be dictated by certain conditions. Where we hold the wedding ceremony depends entirely on the weather—if it's rainy, then we'll have it indoors.
3. To be addicted to something. I have a harder time falling asleep these days, but at least I don't depend on sleeping pills anymore.
See also: depend
depend (up)on someone or something
to rely upon someone or something. (Upon is formal and less commonly used than on.) Can I depend on you to do this right? You can depend upon me for help.
depend onor depend upon
1. To be contingent upon something or someone for an outcome: Whether or not we go on the picnic depends on the weather.
2. To rely on something or someone, especially for support or maintenance: Children depend on adults for food and shelter.
3. To place trust or confidence in someone or something: You can depend upon my honesty.
4. To have a chronic or compulsive need for something; be addicted to something: As time went by, he began to depend on painkillers to get him through the day.