3010. From this it is evident what is meant by 'the Christ' in Matthew,

See that no one leads you astray, for many will come in My name, saying, I am the Christ; and they will lead many astray. Then if anyone says to you, Behold, here is the Christ! or, There! do not believe it. For false Christs and false prophets will arise. Matthew 24:4-5, 23-24; Mark 13:21-22.

Here 'false Christs' means truths which are not Divine - that is, falsities - and 'false prophets' those who teach such falsities, 2534. In the same gospel,

Neither be called masters, for you have one Master, the Christ. Matthew 23:10.

'The Christ' stands for Divine truth. This shows what is meant by a Christian, namely one governed by truth derived from good.