1. cosign - Noun
2. cosign - Verb
sign and endorse (another person's signature), as for a loan
sign jointly
Source: WordNetNever cosign a loan. Once you have cosigned, you cannot get out of it - even on your deathbed. Suze Orman
Husband and wife co-signed the lease Source: Internet
CoSign is also centrally managed from within the network by your organization or service provider for reliable control over signature privileges. Source: Internet