1. [noun] Any device that activates or deactivates the components of a machine or system according to a preplanned sequence (as in a washing machine, or central heating system).
2. [noun] A device or system that orders and/or modifies digitally stored music and sound for playback.
3. [noun] A device for determining the sequence of monomers in a polymer, especially amino acids in protein, or bases in DNA; A sequenator.
4. [noun] A control device to increase/decrease the capacity of plant that is enabled to act in a specific order or sequence.
5. [noun] (chemistry) an apparatus that can determine the sequence of monomers in a polymer.
6. [noun] Computer hardware that sorts data or programs into a predetermined sequence.
