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Entry 2 senses · 2 variants Webster, 1913

Riprap

· Rip·rap · IPA /ˈɹɪpɹap/
01 n. A foundation or sustaining wall of stones thrown together without order, as in deep water or on a soft bottom, or in a river channel.
  1. 1.
    A foundation or sustaining wall of stones thrown together without order, as in deep water or on a soft bottom, or in a river channel.(Masonry)
02 v. t. To form a riprap in or upon.
imp. & p. p. Riprapped; p. pr. & vb. n. Riprapping
  1. 1.
    To form a riprap in or upon.