Definition of "tier" in English

noun

1. One who ties (knots, etc.).

2. Something that ties.

3. (archaic) A child's apron.

noun

1. A row or range, especially one at a higher or lower level than another.

2. A rank or grade; a stratum.

   • Stoke City were playing in the second tier of English football before being promoted to the Premier League.

3. (Australia) A (typically forested) range of hills or mountains, especially in South Australia or Tasmania; a mountain.

4. A horizontal row of panels within a comic strip.

verb

1. (transitive) To arrange in layers.

2. (transitive) To cascade in an overlapping sequence.

3. (transitive, computing) To move (data) from one storage medium to another as an optimization, based on how frequently it is accessed.