What is Child?

Alternative Forms: Children
Legal Definition
Biologically, a child (plural: children) is a human being between the stages of birth and puberty. The legal definition of child generally refers to a minor, otherwise known as a person younger than the age of majority.

Child may also describe a relationship with a parent (such as sons and daughters of any age) or, metaphorically, an authority figure, or signify group membership in a clan, tribe, or religion; it can also signify being strongly affected by a specific time, place, or circumstance, as in "a child of nature" or "a child of the Sixties".

There are many social issues that affect children, such as childhood education, bullying, child poverty, dysfunctional families, child labor, hunger, and child homelessness. Children can be raised by parents, by fosterers, guardians or partially raised in a day care center.
-- Wikipedia
Legal Definition
In family law, a child is the offspring, whether biological or adopted, of either one or both of the spouses (parents). In the event of divorce, the child is considered an ancillary issue to the litigation. Before the divorce can be finalized all issues regarding the child, such as custody, visitation and child support, must be decided. Although a person is the child of another at any age, with regards to family law, children considered ancillary to the action are younger than 18 years-old, or if over 18 years-old, are attending college.
Legal Definition
Domestic relations. A child is the son or daughter in relation to the father or mother.

2. We will here consider the law, in general terms, as it relates to the condition, duties, and rights of children; and, afterwards, the extent which has been given to the word child or children by dispositions in wills and testaments.

3. - 1. Children born in lawful wedlock, or within a competent time afterwards, are presumed to be the issue of the father, and follow his condition; thoseborn out of lawful wedlock, follow the condition of the mother. The father is bound to maintain his children and to educate them, and to protect them from injuries. Childrenare, on their part, bound to maintain their fathers and mothers, when in need, and they are of ability so to do. Poth. Du Marriage, n. 384, 389. The father in general is entitled to the custody of minor children, but, under certain circumstances, the mother will be entitled to them, when the father and mother have separated. 5 Binn. 520. Children are liable to the reasonable correction of their parents. Vide Correction

4. - 2 The term children does not ordinarily and properly speaking comprehend grandchildren, or issue generally; yet sometimes that meaning is, affixed to it, in cases of necessity; 6 Co. 16; and it has been held to signify the same as issue, in cases where the testator, by using the terms children and issue indiscriminately, showed his intention to use the former term in the sense of issue, so as to entitle grandchildren, & c., to take under it. 1 Ves. sen. 196; Ambl. 555; 3 Ves. 258; Ambl. 661; 3 Ves. & Bea. 69. When legally construed, the term children is confined to legitimate children. 7 Ves. 458. The civil code of Louisiana, art. 2522, n. 14, enacts, that "under the, name of children are comprehended, not only children of the first degree, but the grandchildren, great-grand-children, and all other descendants in the direct line."

5. Children are divided into legitimate children, or those born in lawful wedlock; and natural or illegitimate children, who are born bastards. (q. v.) Vide Natural Children. Illegitimate children are incestuous bastards, or those which are not incestuous.

6. Posthumous children are those who are born after the death of their fathers. Domat, Lois Civ. liv. prel. t. 2, s. 1, 7 L. 3, 1, ff de inj. rupt.

7. In Pennsylvania, the will of their fathers, in, which no provision is made for them, is revoked, as far as regards them, by operation of law. 3 Binn. R. 498. See, as to the law of Virginia on this subject, 3 Munf. 20, and article In ventre sa mere. Vide, generally, 8 Vin. Ab. 318; 8 Com. Dig. 470; Bouv. Inst. Index, h. t.; 2 Kent, Com. 172; 4 Kent, Com. 408, 9; 1 Rop. on Leg. 45 to 76; 1 Supp. to Ves. jr. 442 Id. 158; Natural children.
-- Bouviers Law Dictionary
Legal Definition
This word has two meanings in law:

(1) In the law of the domestic relations, and as to descent and distribution, it is used strictly as the correlative of "parent," and means a son or daughter considered as in relation with the father or mother.

(2) In the law of negligence, and in laws for the protection of children, etc., it is used as the opposite of "adult," and means the young of the human species, (generally under the age of puberty,) without any reference to parentage and without distinction of sex. Miller v. Finegan, 26 Fla. 29, 7 South. 140, 6 L. R. A. 813.
See also
-- Black's Law Dictionary
Legal Definition
Offspring; progeny. Legitimate offspring; children born in wedlock. Bell v. Phyn, 7 Ves. 458. The general rule is that "children," in a bequest or devise, means legitimate children. Under a devise or bequest to children, as a class, natural children are not included, unless the testator's intention to include them is manifest, either by express designation or necessary implication. Heater v. Van Auken, 14 N. J. Eq. 159 ; Gardner v. Heyer, 2 Paige (N. Y.) 11.

In deeds, the word "children" signifies the immediate descendants of a person, in the ordinary sense of the word, as contra-distinguished from issue; unless there be some accompanying expressions, evidencing that the word is used in an enlarged sense. Lewis, Perp. 196. In wills, where greater latitude of construction is allowed, in order to effect the obvious intention of the testator, the meaning of the word has sometimes been extended, so as to include grandchildren, and it has been held to be synonymous with issue. Lewis, Perp. 195, 196 ; 2 Crabb, Real Prop. pp. 38, 39, ยงยง 988, 989 ; 4 Kent, Comm. 345, 346,

note.The word "heirs," in its natural signification, is a word of limitation ; and it is presumed to be used in that sense, unless a contrary intention appear. But the term "children," in its natural sense. Is a word of purchase, and is to be taken to have been used as such, unless there are other expressions in the will showing that the testator intended to use it as a word of limitation only. Sanders, Matter of, 4 Paige (N. Y.) 293; Rogers v. Rogers, 3 Wend. (N. Y.) 503, 20 Am. Dec. 716.

In the natural and primary sense of the word "children," it Implies immediate offspring, and, ia its legal acceptation, is not a word of limitation, unless it is absolutely necessary so to construe it in order to give effect to the testator's intention. Echols v. Jordan, 39 Ala. 24.

"Children" is ordinarily a word of description, limited to persons standing in the same relation, and has the same effect as if all the names were given; hut heirs, in the absence of controlling or explanatory words, includes more remote descendants, and is to be applied per stirpes. Bal-com v. Haynes, 14 Alien (Mass.) 204.
-- Black's Law Dictionary