foreign; strange, unusual; unacquainted with, ignorant of

as noun:
 foreigner, stranger, one from abroad; refugee (under the protection of); 
one who receives and entertains another hospitably, host

14 times

(1) Matthew 25:35
For I was an hungred, and ye gave me meat: I was thirsty , and ye gave me drink: I was a stranger, and ye took me in:
ξένος [xenos] nom. sing. masc.

(2) Matthew 25:38
When saw we thee a stranger, and took [thee] in? or naked, and clothed [thee]?
ξένον [xenon] accus. sing. masc.

(3) Matthew 25:43 
I was a stranger, and ye took me not in: naked, and ye clothed me not: sick, and in prison, and ye visited me not.
ξένος [xenos] nom. sing. masc.

(4) Matthew 25:44
Then shall they also answer him, saying, Lord, when saw we thee an hungred, or athirst, or a stranger, or naked, or sick, or in prison, and did not minister unto thee?
ξένον [xenon] accus. sing. masc.

(5) Matthew 27:7
And they took counsel, and bought with them the potter's field, to bury strangers in.
τοῖς ξένοις [tois xenois] dat. pl. masc.
- "to bury strangers in":
    εἰς    ταφὴν   τοῖς     ξένοις
    eis     taphên     tois       xenois
     to      burial     to the   strangers

Latin Vulgate: in sepulturam peregrinorum

(6) Acts 17:18
Then certain philosophers of the Epicureans, and of the Stoicks, encountered him. And some said, What will this babbler say? other some, He seemeth to be a setter forth of strange gods: because he preached unto them Jesus, and the resurrection.
ξένων [xenôn] gen. pl. neuter.

(7) Acts 17:21
(For all the Athenians and strangers which were there spent their time in nothing else, but either to tell, or to hear some new thing.)
ξένοι [xenoi] nom. pl. masc.

(8) Romans 16:23
Gaius mine host, and of the whole church, saluteth you. Erastus the chamberlain of the city saluteth you, and Quartus a brother.
ξένος [ho xenos] nom. sing. masc.

(9) Ephesians 2:12
That at that time ye were without Christ, being aliens from the commonwealth of Israel, and strangers from the covenants of promise, having no hope, and without God in the world:
ξένοι [xenoi] nom. pl. masc.

(10) Ephesians 2:19
Now therefore ye are no more strangers and foreigners, but fellowcitizens with the saints, and of the household of God;
ξένοι [xenoi] nom. pl. masc.

(11) Hebrews 11:13 
These all died in faith, not having received the promises, but having seen them afar off, and were persuaded of [them], and embraced [them], and confessed that they were strangers and pilgrims on the earth.
ξένοι [xenoi] nom. pl. masc.

(12) Hebrews 13:9
Be not carried about with divers and strange doctrines. For [it is] a good thing that the heart be established with grace; not with meats, which have not profited them that have been occupied therein.
ξέναις [xenais] dat. pl. fem.

(13) 1 Peter 4:12 
Beloved, think it not strange concerning the fiery trial which is to try you, as though some strange thing happened unto you:
ξένου [xenou] gen. sing. neuter.

(14) 3 John 1:5 
Beloved, thou doest faithfully whatsoever thou doest to the brethren, and to strangers;
ξένους [xenous] accus. pl. masc.
- "to the brethren, and to strangers":

Textus Receptus:
   εἰς   τοὺς  ἀδελφοὺς    καὶ    εἰς    τοὺς    ξένους
   eis    tous     adelphous      kai     eis      tous     xenous
    to     the       brothers       and      to     the     strangers

   εἰς   τοὺς   ἀδελφοὺς    καὶ      τοῦτο       ξένους
   eis    tous     adelphous      kai         touto          xenous
    to    the       brothers        and          this       to strangers