between

1. at, into, or across the space separating (two objects or regions).

   the border between Mexico and the United States

   the dog crawled between us and lay down at our feet

   those who travel by train between London and Paris

2. in the period separating (two points in time).

   they snack between meals

   the long, cold nights between autumn and spring

3. in the interval separating (two points on a scale).

   a man aged between 18 and 30

   between 25 and 40 per cent off children's clothes

4. indicating a connection or relationship involving two or more parties.

   links between science and industry

   negotiations between the two companies are continuing

5. by combining the resources or actions of (two or more people or other entities).

   we have created something between us

   oxygen and nitrogen between them account for 99 per cent of air

1. in or along the space separating two objects or regions.

   layers of paper with tar in between

   from Leipzig to Dresden, with the gentle Elbe flowing between

2. in the period separating two points in time.

   sets of exercises with no rest in between

Old English betwēonum, from be ‘by’ + a Germanic word related to two.