1. the act of approving; approbation.
2. formal permission or sanction.
3. Philately. one of a group of selected stamps sent by a dealer to a prospective customer for examination and either purchase or return. Idioms
4. on approval, without obligation to buy unless satisfactory to the customer upon trial or examination and, otherwise, returnable: We ship merchandise on approval.
"processes can be approval."
"means can be approval."
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