Intermediate, intervening. With general reference to position in space, time, or order. Also of a person: intermediary (now rare); cf. middleman, n.…

Intermediate in time; coming or occurring between two points of time or two events; intervening. †in the mean season (also space): = in the meantime…

That interlopes, or is an interloper.

Done, made, provided, occurring, etc. in or for the meantime; provisional, temporary. Formerly also of time: Intervening.

Of time, the course of events: Intervening.

Applied to a point in or interval of time: occurring casually or irregularly, esp. between periods of fixed occupation; occasional.

Coming or occurring between two things, places, etc.; ‘holding the middle place or degree between two… Occurring or coming between two points of time…

Occurring between certain points of time or events; happening in or occupying an interval.

= intermediate, adj.

gen. That intervenes.

Occupying an interval in time or order.