noun

• The act of displacing, or the state of being displaced.
• (geology) The displacement of parts of rocks or portions of strata from the situation which they originally occupied.
• The act of dislocating, or putting out of joint; also, the condition of being thus displaced.
• (materials science) A linear defect in a crystal lattice. Because dislocations can shift within the crystal lattice, they tend to weaken the material, compared to a perfect crystal.
• (grammar) A sentence structure in which a constituent that could otherwise be either an argument or an adjunct of a clause occurs outside of and adjacent to the clause boundaries.