underage \un"der*age`\ ([u^]n"d[~e]r*[i^]j), a. Shortage or deficiency in amount; shortfall. [Obs.]

[1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

Under-age \Un"der-age`\, a.

1. Not having arrived at adult age; hence, incapable legally of performing certain acts restricted to adults. [PJC]

2. Not having arrived at adult age, or at years of discretion; hence, raw; green; immature; boyish; childish. [Obs.]

[1913 Webster]

I myself have loved a lady, and pursued her with a great deal of under-age protestation. --J. Webster. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

Dependent \De*pend"ent\, a. [L. dependens, -entis, p. pr. dependere. See Depend, and cf. Dependant.]

1. Hanging down; as, a dependent bough or leaf. [1913 Webster]

2. Relying on, or subject to, something else for support; not able to exist, or sustain itself, or to perform anything, without the will, power, or aid of something else; not self-sustaining; subordinate; -- often with on or upon; as, dependent on God; dependent upon friends. Opposite of independent. [Narrower terms: interdependent, mutualist, mutually beneficial; parasitic, parasitical, leechlike, bloodsucking; subordinate; underage; myrmecophilous; symbiotic] Also See: unfree. [1913 Webster]

England, long dependent and degraded, was again a power of the first rank. --Macaulay. [1913 Webster]

3. conditional; contingent or conditioned. Opposite of unconditional.

Syn: qualified. [WordNet 1.5]

4. addicted to drugs.

Syn: addicted, dependent, drug-addicted, hooked, strung-out. [WordNet 1.5]

Dependent covenant or Dependent contract (Law), one not binding until some connecting stipulation is performed.

Dependent variable (Math.), a varying quantity whose changes are arbitrary, but are regarded as produced by changes in another variable, which is called the independent variable. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

37 Moby Thesaurus words for "underage": budding, callow, defalcation, deficiency, deficit, dewy, green, growing, immature, impubic, inadequacy, inexperienced, ingenuous, innocent, insufficiency, intact, juicy, lack, minor, naive, new-fledged, raw, ripening, sappy, scantiness, shortage, tender, unadult, undeveloped, unfledged, unformed, unlicked, unmellowed, unripe, unseasoned, vernal, virginal

Source: Moby Thesaurus II by Grady Ward, 1.0
 

underage adj
1: not of legal age; "minor children" [syn: minor, nonaged] [ant: major]
2: dependent by virtue of youth

Source: WordNet (r) 2.0
 

Under-age \Un"der-age`\, a. Not having arrived at adult age, or at years of discretion; hence, raw; green; immature; boyish; childish. [Obs.]

I myself have loved a lady, and pursued her with a great deal of under-age protestation. --J. Webster.

Source: Webster's Revised Unabridged Dictionary (1913)