from the primary kapto (in the sense of seizing); TDNT - 3:673,429
AV - head 76; 76
1) the head, both of men and often of animals. Since the loss of the head destroys life, this word is used in the phrases relating to capital and extreme punishment.
2) metaph. anything supreme, chief, prominent
2a) of persons, master lord: of a husband in relation to his wife
2b) of Christ: the Lord of the husband and of the Church
2c) of things: the corner stone