There are 2 definitions of livelong in English:

livelong1

Syllabification: live·long
Pronunciation: /ˈlivˌlôNG, -ˌläNG
 
/

adjective

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?

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 anomalous
Pronunciation: əˈnɒm(ə)ləs
adjective
deviating from what is standard, normal, or expected

There are 2 definitions of livelong in English:

livelong2

Line breaks: live|long
Pronunciation: /ˈlɪvlɒŋ/

Entry from British & World English dictionary

noun

A stonecrop, especially orpine.

Definition of livelong in:

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Word of the day anomalous
Pronunciation: əˈnɒm(ə)ləs
adjective
deviating from what is standard, normal, or expected