That is what one of the Greek words for worship (proskuneo) means, which Christians are not supposed to direct to any but God.
I find it interesting that prior to Christianity becoming a state religion, there were some interesting observations made by outsiders. I would need to find the quotes, but I know I have seen where, for one, they were thought to be atheists due to the fact that they had no images that they bowed down to. Secondly, they refused to bow before Caesar, and say he was Lord, despite the fact that in the Old Testament many people were referred to as Lord (e.g. David). The first Christians seemed to be extremely cautious with doing anything that would remotely suggest impropriety with regard to worship.
**The Martyrdom of Polycarp (155 ? a bit later ?) has the Christians of Smyrna doing this long before the Peace of the Church, never mind the Church’s becoming the Roman Empire’s religion: **
Chapter 17. The Christians are refused Polycarp’s body
But when the adversary of the race of the righteous, the envious, malicious, and
wicked one, perceived the impressive nature of his
martyrdom, and [considered] the blameless life he had led from the beginning, and how he was now crowned with the wreath of
immortality, having beyond dispute received his reward, he did his utmost that not the least memorial of him should be taken away by us, although many desired to do this, and to become possessors of his
holy flesh.** For this end he suggested it to Nicetes, the father of
Herod and brother of Alce, to go and entreat the governor not to give up his body to be buried, lest, said he, forsaking Him that was crucified, they begin to worship this one. This he said at the suggestion and urgent persuasion of the
Jews, who also watched us, as we sought to take him out of the fire, being
ignorant of this, that it is neither possible for us ever to forsake
Christ, who suffered for the
salvation of such as shall be saved throughout the whole world (the blameless one for sinners ), nor to worship any other. For Him indeed, as being the
Son of God, we adore; but the
martyrs, as
disciples and followers of the Lord, we worthily
love on account of their extraordinary affection towards their own King and Master, of whom may we also be made companions and fellow-
disciples!**
Chapter 18. The body of Polycarp is burned
The centurion then, seeing the strife excited by the
Jews, placed the body in the midst of the fire, and consumed it.
Accordingly, we afterwards took up his bones, as being more precious than the most exquisite jewels, and more purified than gold, and deposited them in a fitting place, whither, being gathered together, as opportunity is allowed us, with joy and rejoicing, the Lord shall grant us to celebrate the anniversary of his martyrdom, both in memory of those who have already finished their course, and for the exercising and preparation of those yet to walk in their steps.
newadvent.org/fathers/0102.htm