that is allidiom
variants: or that's all
Definition of that is all
1 —used to say that something is finished, completed, or enough "Do you need anything else?" "No, thanks, that's all."They're (just) different, that's all.
2 —used to say that something is all that is needed or wanted I went there to visit friends and that's all.
Love words? Need even more definitions?Merriam-Webster unabridged
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