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1. Contraction of I had.
2. Contraction of I would.
I had or I would
the part of the psyche that is the source of unconscious and instinctive impulses that seek satisfaction in accordance with the pleasure principle. Compare ego (def. 2), superego.
[1924; < Latin id it, as a translation of German Es literally, it]
n., pl. ID's, IDs
v., ID'd or IDed or ID'ed, ID'ing or ID•ing.
1. a means of identification, as a document containing information regarding the bearer's identity.v.t.
2. to identify.
3. to issue an ID to: Go to the admissions office if you haven't been ID'd yet.
1. Also, Id. Idaho.
2. Also, i.d. inside diameter.
3. (Iraq) dinar.
contraction of I would or I had.
a suffix of nouns that have the general sense “offspring of, descendant of,” occurring orig. in loanwords from Greek (Atreid; Nereid), and productive in English on the Greek model, esp. in names of dynasties, with the dynasty's founder as the base noun (Abbasid; Fatimid), and in names of periodic meteor showers, with the base noun usu. denoting the constellation or other celestial object in which the shower appears (Perseid).
[< Latin -id-, s. of -is < Greek]
a suffix occurring in English derivatives of modern Latin taxonomic names, esp. zoological families and classes; such derivatives are usu. nouns denoting a single member of the taxon or adjectives with the sense “pertaining to” the taxon: arachnid; canid.
[< Greek -idēs]
var. of -ide: lipid.
a suffix occurring in descriptive adjectives borrowed from Latin, often corresponding to nouns ending in -or1: humid; pallid.
[< Latin -idus]
3. Intelligence Department.