Meaning of the word "all along" in English

What does "all along" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

all along

US /ɔːl əˈlɔːŋ/
UK /ɔːl əˈlɒŋ/
"all along" picture

Adverb

from the very beginning; all the time

Example:
She knew all along that he was lying.
It turns out he was planning this all along.