[1] : The Collaborative International Dictionary of English v.0.48

authorization \au`thoriza"tion\, n. cf. f. autorisation.
   the act of giving authority or legal power; establishment by
   authority; sanction or warrant.
   1913 webster

         the authorization of laws.               --motley.
   1913 webster

         a special authorization from the chief.  --merivale.
   1913 webster

[2] : WordNet (r) 2.0

authorization
     n 1: a document giving an official instruction or command syn: mandate,
           authorisation
     2: the power or right to give orders or make decisions; "he has
        the authority to issue warrants"; "deputies are given
        authorization to make arrests" syn: authority, authorisation,
         dominance, say-so
     3: official permission or approval; "authority for the program
        was renewed several times" syn: authority, authorisation,
         sanction
     4: the act of conferring legality or sanction or formal warrant
        syn: authorisation, empowerment
see also:
mandate authorisation authority dominance say-so sanction 
empowerment 

[3] : Moby Thesaurus II by Grady Ward, 1.0

187 moby thesaurus words for "authorization":
   john hancock, ok, acceptance, accession, accredit, acme, advance,
   affidavit, affirmance, affirmation, agency, agentship, aid, allow,
   allowance, anointing, anointment, appointment, approbation,
   approval, approve, arrogation, assignment, assist, assumption,
   attestation, authentication, authority, be-all and end-all,
   bill of health, blue ribbon, brevet, care, certificate,
   certificate of proficiency, certification, championship, charge,
   clearance, command, commission, commissioning, commitment,
   confirmation, consecration, consent, consignment, control,
   coronation, countenance, countersignature, credential, cure,
   delegated authority, delegation, deposition, deputation,
   devolution, devolvement, diploma, directorship, dominion,
   effectiveness, election, embassy, empower, empowerment, enable,
   enabling, enactment, endorse, endorsement, enfranchisement,
   entitlement, entrusting, entrustment, errand, executorship,
   exequatur, facilitate, factorship, fiat, first place, first prize,
   forward, full power, further, go-ahead, green light, headship,
   hegemony, height, help, highest, imperium, imprimatur, influence,
   jurisdiction, kingship, leadership, leave, legalization, legation,
   legislation, legitimate succession, legitimatization, let, license,
   lieutenancy, lordship, management, mandate, mastership, mastery,
   maximum, mission, most, navicert, ne plus ultra, new high, nod,
   notarization, notarized statement, note, office, okay, palms,
   paramountcy, permission, permit, plenipotentiary power, power,
   power of attorney, power to act, presidency, primacy, procuration,
   promote, proxy, purview, qualify, ratification, record, regency,
   regentship, responsibility, rubber stamp, rule, sanction, say,
   seal, seizure, sheepskin, sigil, signature, signet, sovereignty,
   stamp, stamp of approval, subscription, subserve, succession,
   sufferance, support, supremacy, sway, sworn statement, taking over,
   task, testamur, testimonial, the nod, ticket, top spot, trust,
   trusteeship, usurpation, validation, vest, vicarious authority,
   visa, vise, voucher, warrant, warranty, witness, zenith

Authorization >> A Words
Authorization, definition of term: Authorization
authorization_pag1.html