To separate (a mixture) into its individual constituents by exploiting differences in some chemical or physical property, such as boiling point, particle size, solubility etc.
To divide a total dose of radiation into fractions.
To use the technique of fractionation in hypnosis.
To divide each plaintext symbol into several ciphertext symbols as a preliminary stage of encryption.
Cause to become one; make into a unit; consolidate; merge; combine.
Become one.