I feel that my nose lacks a real defined bridge. Would this result be possible?

Many thanks of rthe question and pictures.
In principle you could have a more defined bridge and smaller tip fashioned by way of non-surgical rhinoplasty, however it would likely take two, possibly more, treatments to slowly build the bridge up. The nose would not be narrower - this could only be achieved by surgical rhinoplasty, but by building it up centrally it would give the illusion of a narrower nose. This also applies to a smaller tip - this can only physically be achieved surgically but the illusion of a smaller tip can be created by HA fillers.
I hope this helps.
Best,
Marcus

Hi, 
With non-surgical treatment you always have an option to surgery.
Defining your nose bridge, slightly higher and relatively smaller looking tips may possible.
I think the hyaluronic acid gel as a filler is a good choice which  complication risk is minimal. İt will last depending the quality of product which used,  between 6 month to 1,5 year. With hyaluronidase injection it is reversible within couple days. Thats why I do not recommend permanent fillers.
Try to find a doctor who understands your needs and whose esthetic vision fits yours.
Most important, try to find one esthetic doctor who can use filler like sculptress use clay.
"This answer has been solicited without seeing this patient and cannot be held as true medical advice, but only opinion. Seek in-person treatment with a trained medical professional for appropriate care."
Good Luck.
Dr. Devrim Elmas, MD
Medical Esthetic Doctor
IG: @drdevrimelmas