Definition of "interstice"

interstice

/ɪnˈtɜː.stɪs/

noun
plural interstices
1. A small opening or space between objects, especially adjacent objects or objects set closely together, as between cords in a rope or components of a multiconductor electrical cable or between atoms in a crystal.
2. (figurative) A fragment of space.
  Quotations
  Relics of the British empire now mostly survive in the interstices of the global economy. They are the major winners from the fiscal haemorrhage that has resulted from financial globalisation.
  2013 August 14, Simon Jenkins, “Gibraltar and the Falklands deny the logic of history”, in The Guardian‎, archived from the original on 10 August 2014
3. An interval of time required by the Roman Catholic Church between the attainment of different degrees of an order.
4. (by extension) A small interval of time free to be spent on activities other than one's primary goal.