What is the mean of consistency????

1. consistent - (sometimes followed by `with') in agreement or consistent or reliable; "testimony consistent with the known facts"; "I have decided that the course of conduct which I am following is consistent with my sense of responsibility as president in time of war"- FDR
invariable - not liable to or capable of change; "an invariable temperature"; "an invariable rule"; "his invariable courtesy"
inconsistent - displaying a lack of consistency; "inconsistent statements cannot both be true at the same time"; "inconsistent with the roadmap"
2. consistent - capable of being reproduced; "astonishingly reproducible results can be obtained"
reproducible
3. consistent - marked by an orderly, logical, and aesthetically consistent relation of parts; "a coherent argument"
coherent, logical, ordered
logical - capable of or reflecting the capability for correct and valid reasoning; "a logical mind"
rational - consistent with or based on or using reason; "rational behavior"; "a process of rational inference"; "rational thought"
4. consistent - the same throughout in structure or composition; "bituminous coal is often treated as a consistent and homogeneous product"
uniform
homogeneous, homogenous - all of the same or similar kind or nature; "a close-knit homogeneous group"