verb

• (obsolete) To engraft or plant (a plant or part of one, a sapling, etc.).
• (figuratively, archaic) To graft or implant (something other than a plant); to fix or set (something) in.
  "That headleſſe tyrants tronke he reard from ground, / And, having ympt the head to it agayne, / Vpon his vſuall beaſt it firmely bound, / And made it ſo to ride, as it aliue was found."
• (falconry, veterinary medicine) To engraft (a feather) on to a broken feather in a bird's wing or tail to repair it; to engraft (feathers) on to a bird, or a bird's wing or tail.
  "I have known feathers so imped that the eye could not discern the place of juncture, and it was difficult even to discover it by passing the thumb-nail down the shaft of the imped feather."
• (by extension)
  "With thee / Let me combine, / And feel this day thy victorie: / For, if I imp my wing on thine, / Affliction ſhall advance the flight in me."

noun

• (chiefly fiction and mythology) A small, mischievous sprite or a malevolent supernatural creature, somewhat comparable to a demon but smaller and less powerful, formerly regarded as the child of the devil or a demon (see sense 3.2).
  ""Yes, there are a great, great many coming after us; at least a score," said the lad.—"Well, that's the troll," said the horse; "he is coming after us with his imps.""
• (by extension)
  "Concourſe, and noiſe, and toil, he ever fled; / Nor cared to mingle in the clamorous fray / Of ſquabbling imps; but to the foreſt ſped, / Or roam'd at large the lonely mountain's head; […]"
• (by extension)
  "When they are upset, their ears blush a furious crimson, resembling red horns and adding to their diabolical image. (Baby devils, packed four to a pouch, are known as imps.)"
• (by extension)

noun

• (video games, slang) Synonym of god (“person who owns and runs a multi-user dungeon”).

noun

• (biochemistry) Initialism of inosine monophosphate.
• (biochemistry) Initialism of integral membrane protein.
• (Canada, military, food) Initialism of individual meal package.