Meaning of Allah's Name Waahid and Ahad

 Meaning of Allah's Name Waahid and Ahad according to Quran and Sunnah

Al-Waahid (the One), al-Ahad (the Unique). He is the One Who is uniquely and utterly and perfectly One, with no partners in His Uniqueness. His slaves are obliged to believe in His Oneness, in belief and word and deed, by recognizing that He is absolutely perfect and is unique in His oneness, and by directing all kinds of worship to Him Alone.

Refer Complete Answer

https://islamqa.info/en/answers/2594/some-of-the-names-of-allaah-and-their-meanings