How is sperm motility defined in the WHO Manual for the examination and processing of human semen, 5th edition, 2010?

Progressive Motility (PR): Spermatozoa moving actively, either linearly or in a large circle, regardless of speed.
Non-Progressive Motility (NP): All other patterns of motility with an absence of progression ie swimming in small circles, the flagellar force hardly displacing the head, or when only flagellar beat can be observed.
Immotility (IM): No movement.