(geology) The displacement of parts of rocks or portions of strata from the situation which they originally occupied. Slips, faults, and the like, are dislocations.
The act of dislocating, or putting out of joint; also, the condition of being thus displaced.
(materials) A lineardefect in a crystallattice. Because dislocations can shift within the crystal lattice, they tend to weaken the material, compared to a perfect crystal.
(grammar) A sentencestructure 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. For example, the sentance, "My father, he is a good man", is a left dislocation because the constituent "My father" has been moved to the left of the clause "he is a good man". See dislocation.