Genetically, I have no neck definition. What procedures can counteract this? (photos)

Thank you for your question and for providing a photo. You are likely a candidate for a lower rhytidectomy, also known as a neck lift. This procedure targets the neck and throat directly by removing submental fat and tightening the skin.
The deeper tissues along the jawline are also tightened to create a smooth and defined contour. Results from this surgery can last for well over ten years. I recommend scheduling an in-person consultation with an experienced, board-certified facial plastic surgeon who can assess your situation and suggest the best approach for achieving the definition you’re looking for.

For a more defined jawline to strengthen your profile (and help prevent the dreaded jawline "jowl" sagging), we use injectable fillers like Revanesse Versa - a filler known to limit swelling and give subtle, soft enhancements - or Radiesse. Using a cannula to limit pain and swelling, we inject on the bone in strategic points to get more lift and shaping, resulting in a more contoured lower face and defined, structured jawline. I would suggest getting a formal evaluation with a facial sculpting expert. Best, Dr. Emer

In order to correct position of neck muscles and to address both superficial and deep fat compartments in anterior neck, you will need a neck lift. Only on the basis of in person evaluation one could decide whether neck or lower face/neck lift would be a better solution. Good luck.

Dear Fearless396272,
Thank you for your question and photos. You are a good candidate for a deep necklift. A deep necklift addresses the platysma muscle, deep neck fat and deep neck musculature. Your neck shape is genetic. It can be optimized. The limiting factor of how sharp your neck shape is your hyoid bone. I recommend you consult with a board certified facial plastic surgeon. I hope this helps!
All the best,Dr. Sanan, MDDouble board certified facial plastic surgeon

It is hard to tell from a picture, and especially hard with justness. However, you appear to be a candidate for nec,k liposuction. Make an appointment with a plastic surgeon with significant experience in liposuction and treating the face and neck.