1. Lasting; all through.

2. Lasting long.

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

• liveline,
• livling,
• lifeling,
• lifelog,
• lifelongf,
• liflong,
• laveling,
• liviong,
• lifelone,
• liifelong,
• livong,
• loveling,
• liveng,
• lifeloing,
• levelang,
• lielong,
• kivelong,
• pivelong,
• oivelong,
• loveesong

• liopelma,
• lifelong,
• life line.

The adjective form of the word "livelong" is "lifelong".

The plural form of "livelong" is "livelongs".

The singular form of the word "livelong" is "livelong day".