verb

• (intransitive) To look sideways or obliquely; now especially with sexual desire or malicious intent.
  "And she looked to Mr. –––– / And leered like a love-sick pigeon."
• (transitive) To entice with a leer or leers.
  "But Bertran has been taught the Arts of Court, / To guild a Face with Smiles; and leer a man to ruin."

noun

• (obsolete) The cheek.
  "No ladie (quoth the earle with a lowd voice, and the tears trilling downe his leeres)"
• (obsolete) The face.
• (obsolete) One's appearance; countenance.
  "a Rosalind of a better leer than you"
• (obsolete) Complexion; hue; colour.
  "Here's a young lad fram'd of another leer. Look, how the black slave smiles upon the father;"

adj

• (obsolete) Empty; unoccupied; clear.
  "The horse runs leere away without the man."
• (obsolete) Destitute; lacking; wanting.
• (obsolete) Faint from lack of food; hungry.
• (UK dialectal, obsolete) Thin; faint.

verb

• (transitive, obsolete) To teach.
• (transitive, obsolete) To learn.