Ik Onkār are the first phase of Mul Mantra.
Here is the meaning of the Mul Mantra:
Ik Onkār sat naam kartaa purakh nirbha-o nirvair akaal moorat ajoonee saibhaN gur parsaad.
One Universal Creator God. The Name Is Truth. Creative Being Personified. No Fear. No Hatred. Image Of The Undying, Beyond Birth, Self-Existent. By Guru’s Grace .
Chant And Meditate:
aad sach jugaad sach.
True In The Primal Beginning. True Throughout The Ages.
hai bhee sach naanak hosee bhee sach.
True Here And Now. O Nanak, Forever And Ever True.
sochai soch na hova-ee jay sochee lakh vaar.
By thinking, He cannot be reduced to thought, even by thinking hundreds of thousands of times.
chupai chup na hova-ee jay laa-ay rahaa liv taar.
By remaining silent, inner silence is not obtained, even by remaining lovingly absorbed deep within.
bhukhi-aa bhukh na utree jay bannaa puree-aa bhaar.
The hunger of the hungry is not appeased, even by piling up loads of worldly goods.
sahas si-aanpaa lakh hohi ta ik na chalai naal.
Hundreds of thousands of clever tricks, but not even one of them will go along with you in the end.
kiv sachi-aaraa ho-ee-ai kiv koorhai tutai paal.
So how can you become truthful? And how can the veil of illusion be torn away?
hukam rajaa-ee chalnaa naanak likhi-aa naal.
O Nanak, it is written that you shall obey the Hukam of His Command, and walk in the Way of His Will.
Waheguru Ji Ka Khalsa, Waheguru Ji Ki Fateh
Wonderful Lord’s Khalsa, Victory is to the Wonderful Lord.