Cervix is “Funneling”? 37 weeks

My doctor told me that my cervix is funneling from the bottom and then showed me on a poster in there by putting his hands together and pulling his palms apart. I thought I understood but I feel as if I should’ve asked more questions because I still don’t quite understand what funneling entails. My first pregnancy there was always a set “you’re x amount of cm dilated” and my mil nor grand mil have ever heard this term and I’ve tried looking it up and everything I find is showing opening from the inside and super early on in pregnancies. Could anyone provide me some clarity on what this means for someone 37 weeks?