Definition of tier:
score, string, horizontal surface, degree, file, class, spirit level, rank, bracket, stage, queue, order, line, storey, group, grad, stratum, range, tier up, league, course, point, floor, column, row, grade, ground level, form, level, value, mark, line, gradation.
- "Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.", George Francis Atkinson.
- "Beric the Briton A Story of the Roman Invasion", G. A. Henty.
- "The Twelfth Hour", Ada Leverson.