Taking time off work go somewhere you don't want to go to do something thoroughly unenjoyable, i.e. attending a funeral or holidays with in-laws.
Susan won't be back for another week, she's on an oblication helping her brother paint his house.
Taking valuable vacation time and dollars for obligatory family or friend visits. Usually oblications blow your PTO balance at work, meaning you will not have a real vacation in the foreseable future.
We didn't make it to the Carribean this year because we sent spring break on an oblication to see the in-laws.
A required or expected visit to family/in-laws during your vacation time. Not exactly what would qualify as a holiday.
But would be a combined obligation/vacation.
"Are you going on vacation this summer?"
"No" he said, "I'm going on an oblication to see family who I haven't see since last year.
When you spend your vacation taking your kids to visit relatives.
I didn't get a vacation, I had to take the kids on an oblication.
Vacation time that is spent with family or friends as an obligation.
Instead of taking a nice vacation to a warm beach destination we took an oblication and spent it with family. Yay!
A "vacation" that isn't really a vacation. You have no choice. You work the whole time but when you get back to your job, everyone asks how your vacation was.
I went on a 5 day oblication to Jamie's wedding in Aruba. I was at her beck and call 24/7.
A vacation, feeling more like an obligation, that involves visiting or staying with family.
So Joe where are you taking the kids for spring break vacation? We are going on an oblication to Boca to visit my mother-in-law.