A "pattern" (in the sense you are asking about) is anything that we can recognise as being non-random. In your example sentence, "pattern" refers to a non-random sequence of sounds (or words) that we eventually come to recognise as conveying a certain meaning.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
ognjenWhat does pattern means?I think a pattern differs from a phrase in being abstract.
e.g.
We just imitate what we hear, noticing words and phrases and PATTERNS.