There are 2 definitions of livelong in English:

livelong1

Line breaks: live|long
Pronunciation: /ˈlɪvlɒŋ
 
/

adjective

[attributive] literary
(Of a period of time) entire: all this livelong day I lay in the sun
More example sentences
  • I love having no idea what time it is, all the livelong day.
  • Late in the day, I came to realise I'd not seen another living soul, apart from Dolly, the livelong day.
  • Why should your beloved canine doppelgänger be restricted to a life of culinary and sartorial monotony while you dine out, groom obsessively, and gussy yourself up all the livelong day?
Synonyms

Origin

late Middle English leve longe 'dear long' (see lief, long1). The change in spelling of the first word was due to association with live1.

Definition of livelong in:

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Word of the day humoresque
Pronunciation: ˌhjuːməˈrɛsk
noun
a short, lively piece of music

There are 2 definitions of livelong in English:

livelong2

Line breaks: live|long
Pronunciation: /ˈlɪvlɒŋ
 
/

noun

A stonecrop, especially orpine.

Definition of livelong in: