1) Of or relating to a tube.
2)Constituting or consisting of tubes or a tube.
3) Shaped like a tube.
4) stolen from science by the surf culture and later by pop culture (in the 1980's).
5) see tubeular
6) of or relating to a good thing. See tubeular
a. " Man that wave is sooo tubular"
b. "I got an 'A' on that basket weaving test." "tubular!"