<p><strong>Noun</strong></p><ul><li>an act or instance of slipping.</li><li>a sudden losing of one's foothold, as on slippery ground.</li><li>a mistake in judgment; blunder.</li><li>a mistake or oversight, as in speaking or writing, especially a small one due to carelessness: a minor slip in addition; a slip of the tongue; a slip of the pen.</li><li>Synonyms: fault, error.</li><li>an error in conduct; indiscretion.</li><li>something easily slipped on or off.</li><li>a decline or fall in quantity, quality, extent, etc., or from a standard or accustomed level: a slip in prices.</li><li>Clothing: a woman's undergarment, sleeveless and usually having shoulder straps, extending from above the bust down to the hemline of the outer dress.</li><li>an underskirt, as a half-slip or petticoat.</li><li>a pillowcase.</li><li>an inclined plane, sloping to the water, on which vessels are built or repaired.</li><li>Nautical: the difference between the speed at which a screw propeller or paddle wheel would move if it were working against a solid and the actual speed at which it advances through the water.</li><li>a space between two wharves or in a dock for vessels to lie in.</li><li>Electricity: the difference between the synchronous and the operating speeds of a motor.</li><li>Machinery: the difference between output speed and input or theoretical speed in certain fluid or electromagnetic devices, as couplings or motors.</li><li>(in pumps) the difference between the actual volume of water or other liquid delivered by a pump during one complete stroke and the theoretical volume as determined by calculation of the displacement.</li><li>unintended movement or play between mechanical parts or the like.</li><li>Cricket: the position of a fielder who stands behind and to the offside of the wicketkeeper.</li><li>the fielder playing this position.</li><li>Geology: the relative displacement of formerly adjacent points on opposite sides of a fault, measured along the fault plane.</li><li>a small fault.</li><li>Metallurgy: plastic deformation of one part of a metallic crystal relative to the other part due to shearing action.</li></ul><p><strong>Verb</strong></p><ul><li>to move, flow, pass, or go smoothly or easily; glide; slide: Water slips off a smooth surface.</li><li>Synonyms: slither.</li><li>to slide suddenly or involuntarily; to lose one's foothold, as on a smooth surface: She slipped on the icy ground.</li><li>to move, slide, or start gradually from a place or position: His hat had slipped over his eyes.</li><li>to slide out of or become disengaged from a fastening, the grasp, etc.: The soap slipped from my hand.</li><li>to pass without having been acted upon or used; be lost; get away: to let an opportunity slip.</li><li>to pass from the mind, memory, or consciousness.</li><li>to elapse or pass quickly or imperceptibly (often followed by away or by): The years slipped by.</li><li>to become involved or absorbed easily: to slip into a new way of life.</li><li>to move or go quietly, cautiously, or unobtrusively: to slip out of a room.</li><li>to put on or take off a garment easily or quickly: He slipped off his shoes.</li><li>to make a mistake or error: As far as I know, you haven't slipped once.</li><li>Synonyms: blunder, err.</li><li>to fall below a standard or accustomed level, or to decrease in quantity or quality; decline; deteriorate: His work slipped last year.</li><li>to be said or revealed inadvertently (usually followed by out): The words just slipped out.</li><li>to read, study, consider, etc., without attention: He slipped over the most important part.</li></ul>