(computing) A bitwise operation in which the bits in a value are shifted left or right.

(physics) The portion of an isotope shift produced by the changing shape of a nucleus upon the addition of a neutron

(physics) The portion of an isotope shift produced by the changing mass of a nucleus upon the addition of a neutron

(quantum mechanics, quantum electrodynamics) A small difference between the energy levels 2S_½ and 2P_½ of the hydrogen atom, not predicted by the Dirac equation, whose detection in the Lamb–Retherford experiment of 1947 foreshadowed the development of quantum electrodynamics (in which the discrepancy is explained to be an effect of the emission and re-absorption of virtual photons); such a difference between otherwise expectedly equal energy levels of hydrogen or any other type of atom.

(linguistics) A change in one of the meanings of a word over time.

(astronomy) Light spectra shifted towards red, as by elongation of light waves from a source moving away from the detector.

present participle of make shift

simple past tense and past participle of make shift

Third-person singular simple present indicative form of make shift

Alternative form of makeshift.