-dəd.ē, -dətē, -i noun
( -es )
Etymology: probably from French fluidité, from Middle French, from fluide fluid + -ité -ity — more at fluid
1.
a. : the quality, state, or degree of being fluid : a liquid or gaseous state
b. : the physical property of a substance that enables it to flow and that is a measure of the rate at which it is deformed by a shearing stress as contrasted with viscosity : the reciprocal of viscosity
2. : changeable or unstable quality: as
a. : easy adaptability : flexibility
showed the fluidity of his mind by changing it frequently
b. : smooth flowing quality (as of language)
the graceful fluidity of the rhythm
c. : tendency to movement of population into or out of an area ; often : the recurrent ebb and flow of population (as between an urban industrial and a suburban residential area)