Although, now that I think about it, I would have to change "different than" to "different from". Y'know. 'Cause it's more grammatically correct.
I think it can be considered an eliptical sentence; the "is" is implied.
No, I do not feel the need to define "is."
"Bowl," however, can be defined as
1. The thing Freckles wears on her head.
2. The thing falling through the air, with petunias in it.
3. The thing that, when inverted, makes up the sky.
Or, as a verb:
4. Rolling the Duffer Sun at random terrified cacti.