What does the word cluster mean?

Usage examples for cluster

  1. Cluster with more berries but about the same size as in Rotundifolia. – Manual of American Grape-Growing by U. P. Hedrick
  2. Above Lady Markland's head was a cluster of delicate golden roses, tinged in their hearts with faint red, in all the wealth of their second bloom. – A Country Gentleman and his Family by Mrs. (Margaret) Oliphant
  3. Though each of a series of sentences may be correct, they may, as a whole, say but little, and that very poorly; while another set of sentences, which cluster around some central idea, may set it forth most effectively. – Composition-Rhetoric by Stratton D. Brooks