1. Lateral; oblique.

2. Laterally; obliquely; on the side.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• sideling,
• aidelong,
• zidelong,
• xidelong,
• didelong,
• eidelong,
• widelong,
• sudelong,
• sjdelong,
• skdelong,
• sodelong,
• siedelong,
• siddelong,
• sidellong,
• siedlong,
• sidleong,
• endelong,
• siddeling,
• sideonio,
• idelog

• sideline,
• Sidelinger.

The adjective form of the word "sidelong" is "sidelong".

The plural form of the word "sidelong" is "sidelongs".

The singular form of the word "sidelong" remains the same.