noun

• (anatomy) The joint between the upper arm and the forearm.
  "Up to the elbowes naked were there Armes."
• (by extension) Any turn or bend like that of the elbow, in a wall, building, coastline, etc.; an angular or jointed part of any structure, such as the raised arm of a chair or sofa, or a short pipe fitting, turning at an angle or bent.
  "the sides of windows, where the jamb makes an elbow with the window back"
• (US, dated, early 20th-century slang) A detective.
  ""An elbow, huh?" putting all the contempt he could in his voice; and somehow any synonym for detective seems able to hold a lot of contempt."
• (basketball) Part of a basketball court located at the intersection of the free-throw line and the free-throw lane.

verb

• (transitive) To push with the elbow or elbows; to forge ahead using the elbows to assist.
  "He elbowed his way through the crowd."
• (informal, with "out" or "aside") To force (someone) to quit or lose their job so that someone else can be hired.
  "The president was elbowed out of power by members of her own party."