Yoga Sutras of Patanjali translated by Yogi Kalinath - Chapter 1, Verse 42
Pada 1, Sutra 42
Tatra shabdartha-jnana-vikalpaih sankirna savitarka samapattih
At this stage, when the mind achieves identity with the object of concentration together with the awareness of word, meaning, knowledge and conceptualization this is called Cognitive Absorption with reflection or Savitarka Samadhi.
Savitarka Samadhi implies Cognitive Absorption with deliberation as the concepts of name, meaning, knowledge and conceptualization of the object being concentrated upon and identified with are still there. What separates Savitarka Samadhi from ordinary thinking is that in Savitarka Samadhi the reflection on the object through word, meaning, knowledge and conceptualization arise spontaneously and effortlessly whereas in ordinary thinking they arises through wandering thoughts and vague ideas and not through Cognitive Absorption.