The phrase "recline function" refers to a feature or ability of a chair or seat that allows it to tilt backwards, allowing the person sitting in it to lean back and relax. Full definition
They have adjustable head restraints and reclining function for added convenience. (cardekho.com)
Those soft leather seats also feature electric reclining function that ups the comfort levels for longer trips. (motoring.com.au)
Comfort goodies on the premium SUV comprise panoramic sunroof, electric tail-gate, height adjuster for driver's seat, power - operated heated wing mirrors with foldable function, dual - zone auto climate control with rear AC vents, 10 - way electric driver's seat, cooled glove - box, rear seat arm rest with cup holder, 60:40 split rear seat with reclining function, auto defogger and smart key & push button start among others. (auto.ndtv.com)