1. authorization, sanction, or justification.
2. something that serves to give reliable or formal assurance of something; guarantee, pledge, or security.Synonyms: warranty, surety.
3. something considered as having the force of a guarantee or as being positive assurance of a thing: The cavalry and artillery were considered sure warrants of success.
4. a writing or document certifying or authorizing something, as a receipt, license, or commission.Synonyms: permit, voucher, writ, or
"searches can be warrantless."
"authorities can be warrantless."
This list can help you learn new vocabulary more quickly and be able explore other words more easily.