LSJ Gloss:πρεσβείαage, seniorityDodson:πρεσβείαan embassy, delegationan embassy, delegation, eldership.
Strong's:πρεσβεία seniority (eldership), i.e. (by implication) an embassy (concretely, ambassadors)Derivation: from G4243;KJV Usage: ambassage, message. G4243
TBESG:πρεσβείαdelegationG:N-F πρεσβεία, -ας, ἡ (< πρεσβεύω), [in LXX: 2Ma.4:11 * ;] __1. age, seniority. __2. rank, dignity. __3. an embassy; by meton., of the ambassadors, embassy: Refs Luk.14:32 19:14.† (AS)
Thayer:1) age, dignity, right of the first born 2) the business normally intrusted to elders, spec. the office of an ambassador, an embassy
πρεσβεία presbeia pres-bi'-ah From G4243; seniority (eldership), that is, (by implication) an embassy (concretely ambassadors)KJV Usage: ambassage, message.
πρεσβεύω presbeuō pres-byoo'-o From the base of G4245; to be a senior, that is, (by implication) act as a representative (figuratively preacher)KJV Usage: be an ambassador.