noun

• (engineering) A period of time in which a system or component remains in a given state.
• (engineering) A brief pause in the motion of part of a mechanism to allow an operation to be completed.
• (electrical engineering) A planned delay in a timed control program.
• (automotive) In a petrol engine, the period of time the ignition points are closed to let current flow through the ignition coil in between each spark. This is measured as an angle in degrees around the camshaft in the distributor which controls the points, for example in a 4-cylinder engine it might be 55° (spark at 90° intervals, points closed for 55° between each).

verb

• (intransitive, now literary) To live; to reside.
  "I am fully resolved to go dwell in another house."
• (intransitive) To linger (on); to remain fixated. [with on ‘a particular thought, idea, etc.’]
  "Steven, stop dwelling on the past! But you stole my kidney!"
• (intransitive, engineering) To be in a given state.
• (intransitive) To abide; to remain; to continue.
  "My liefe (ſayd ſhe) ye know, that long ygo, / Whileſt ye in durance dwelt, ye to me gaue / A little mayde, the which ye chylded tho ; / The ſame againe if now ye liſt to haue, / The ſame is yonder Lady, whom high God did ſaue."