What does "conglomerate" mean?

Additional senses

1. 2.(Geol.) Composed of stones, pebbles, or fragments of rocks, cemented together.
2. 3.That which is heaped together in a mass or conpacted from various sources; a mass formed of fragments; collection; accumulation. A conglomerate of marvelous anecdotes, marvelously heaped together. Trench.
3. 4.(Geol.) A rock, composed or rounded fragments of stone cemented together by another mineral substance, either calcareous, siliceous, or argillaceous; pudding stone; -- opposed to agglomerate. See Breccia. A conglomerate, therefore, is simply gravel bound together by a cement. Lyell.
4. 5.To gather into a ball or round body; to collect into a mass.