The word "recline" means to lean back or relax in a comfortable position, usually by tilting a chair or resting on a cushioned surface. Full definition
All cars come with air conditioning, a responsive touchscreen infotainment system with USB connection, a leather trimmed steering wheel and split - folding rear seats with reclining seat backs as standard. (autoexpress.co.uk)
Fully upright seat recline position for children who like to look at everything while in a stroller. (mommystroller.com)
Due to the angle of the seat recline in front of you, the TVs have an awkward angle and tend to be very bright, even at the lowest setting. (travelcodex.com)