An agreement between an employer and a union such that the union will represent all the workers at a particular workplace.

(computer hardware) The part of a computer that fetches, decodes and executes instructions; attached directly to the memory.

(physics) A constant used as a unit of measurement for particle spin, equal to Planck's constant divided by 2π.

(cinematography) A separate team that shoots footage that is of secondary importance for the final cut of the motion picture, as opposed to first unit.

(cinematography) The team that shoots footage which is of primary importance for the final cut of the motion picture, including all scenes involving actors, or at least stars of the motion picture.

(networking) A packet of data exchanged between two application programs across a network.

(US) any unit of measurement that is currently used in the United States / any traditional unit of measurement that is used by custom

(chemistry) A specific arrangement of atoms that repeats within a macromolecule / (genetics) A specific sequence of bases that repeats within a nucleic acid (or of amino acids within a protein)

Not imaginative.

(US politics) The State of the Union address, an annual event in which a president of the United States reports the status of the country, normally to a joint session of the United States Congress.