Meaning of 呼吸阿吽 in Japanese

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Definition of 呼吸阿吽

あうん(aun) · アウン(aun) 【阿吽 ·阿うん ·阿呍】

(n) Om; Aun; syllable representing the primordial trinity of Vishnu, Shiva and Brahma
inspiration and expiration; respiration; alpha and omega

こきゅう(kokyuu) 【呼吸】

(n, vs, adj-no) breath; respiration
呼吸は？
Is he breathing?
knack; trick; secret (of doing something)
英語の発音の呼吸がなかなか飲み込めない。
I still can't get the knack of English pronunciation.