1. Absence or lack of order; lack of coordination: "Her cousin always refused to dance because of her sense of ataxia and feeling as if she had two left feet."
2. The inability of someone to be physically able to perform complex moves during muscle activity while making voluntary movements or when doing irregular muscular actions: "Swimming proved to be difficult for her sister because of her ataxia and inability to move her arms and legs in coordinated sequencial motions."
3. Unsteadiness, incoordination or disorganization of movements in the absence of paralysis: "For a few moments after getting off the Merry-Go-Round, the boy looked as if he were experiencing ataxia, staggering with dizziness and walking in an uncoordinated way."