no idea what your dictionary metaphor means here. If you are going to services today, I’d be interested in hearing what your priest has to say on this. Or when you get the chance to discuss it with him. I ask because I skimmed the Catholic Encyclopedia article on Trinity and while it gives many scriptual supports for Trinity (which I would disagree with but that’s for another thread), it does not quote the verse you are referring to. Below is a portion of the article:
The early Fathers were persuaded that indications of the doctrine of the Trinity must exist in the Old Testament and they found such indications in not a few passages. Many of them not merely believed that the Prophets had testified of it, they held that it had been made known even to the Patriarchs. They regarded it as certain that the Divine messenger of Genesis 16:7, 16:18, 21:17, 31:11; Exodus 3:2, was God the Son; for reasons to be mentioned below (III. B.) they considered it evident that God the Father could not have thus manifested Himself (cf. Justin, “Dial.”, 60; Irenaeus, “Adv. haer.”, IV, xx, 7-11; Tertullian, “Adv. Prax.”, 15-16; Theophilus, “Ad Autol.”, ii, 22; Novat., “De Trin.”, 18, 25, etc.). They held that, when the inspired writers speak of “the Spirit of the Lord”, the reference was to the Third Person of the Trinity; and one or two (Irenaeus, “Adv. haer.”, II, xxx, 9; Theophilus, “Ad. Aut.”, II, 15; Hippolytus, “Con. Noet.”, 10) interpret the hypostatic Wisdom of the Sapiential books, not, with St. Paul, of the Son (Hebrews 1:3; cf. Wisdom 7:25-26), but of the Holy Spirit. But in others of the Fathers is found what would appear to be the sounder view, that no distinct intimation of the doctrine was given under the Old Covenant. (Cf. Gregory Nazianzen, “Or. theol.”, v, 26; Epiphanius, “Ancor.” 73, “Haer.”, 74; Basil, “Adv. Eunom.”, II, 22; Cyril of Alexandria, “In Joan.”, xii, 20.)