Inability to coordinate voluntary muscle movements; unsteady movements and staggering gait WordNet 3.0 & Open English WordNet

Ataxia is a neurological sign consisting of lack of voluntary coordination of muscle movements that can include gait abnormality, speech changes, and abnormalities in eye movements, that indicates dysfunction of parts of the nervous system that coordinate movement, such as the cerebellum. Wikipedia

Neurological sign consisting of lack of voluntary coordination of muscle movements that includes gait abnormality. Wikipedia Disambiguation

Neurological sign consisting of lack of voluntary coordination of muscle movements Wikidata

Partial or complete loss of coordination of voluntary muscular movements. This can interfere with a person's ability to walk, talk, eat, and perform other tasks of daily living. OmegaWiki

Lack of coordination. Wiktionary (translation)

Lack of coordination while performing voluntary movements, which may appear to be clumsiness, inaccuracy, or instability. Wiktionary