mid-

Prefix

mid-

1. Denoting the middle part.
   • He's in his mid-thirties — meaning he is roughly around the age of 33-37, as opposed to one's early thirties (aged roughly 30–33) and one's late thirties (aged roughly around 37-39).
   • He was born in the mid-1930s.

   Synonyms:

   medio-, especially between countable nouns

2. Occupying a middle position.
   • a mid-shoulder stretch
3. Intermediate
   • mid-key, midclass, midgut, midbrow

   Synonyms:

   meso-, medio-, especially when comparing sizes

4. Amid.

   Synonyms:

   inter-, dia-, especially of space

5. During, in the middle of doing something.
   • He was hit by a ball mid-jump.

   Synonyms:

   intra-, peri-, especially of time