A youthful male person:
— The baby was a boy.
— She made the boy brush his teeth every night.
— Most soldiers are only boys in uniform.

synonym: male child.

Roget 129: infant, babe, baby, babe in arms; nurseling, suckling, yearling, weanling; papoose, bambino; kid; vagitus.    child, bairn [Scot.], little one, brat, chit, pickaninny, urchin; bantling, bratling^†; elf.    youth, boy, lad, stripling, youngster, youngun, younker^†, callant^†, whipster^†, whippersnapper, whiffet [U.S.], schoolboy, hobbledehoy, hopeful, cadet, minor, master.    scion; sap, seedling; tendril, olive branch, nestling, chicken, larva, chrysalis, tadpole, whelp, cub, pullet, fry, callow; codlin, codling; foetus, calf, colt, pup, foal, kitten; lamb, lambkin^†; aurelia^†, caterpillar, cocoon, nymph, nympha^†, orphan, pupa, staddle^†.    girl; lass, lassie; wench, miss, damsel, demoiselle; maid, maiden; virgin; hoyden.    ... show more

Roget 373: man, male, he, him; manhood etc. (adolescence) 131; gentleman, sir, master; sahib; yeoman, wight^†, swain, fellow, blade, beau, elf, chap, gaffer, good man; husband etc. (married man) 903; Mr.   , mister; boy etc. (youth) 129.    [Male animal] cock, drake, gander, dog, boar, stag, hart, buck, horse, entire horse, stallion; gibcat^†, tomcat; he goat, Billy goat; ram, tup; bull, bullock; capon, ox, gelding, steer, stot^†.    androgen.    homosexual, gay, queen [Slang].    ... show more

Roget 746: subject, liegeman^†; servant, retainer, follower, henchman, servitor, domestic, menial, help, lady help, employe, attache; official.    retinue, suite, cortege, staff, court.    attendant, squire, usher, page, donzel^†, footboy^†; train bearer, cup bearer; waiter, lapster^†, butler, livery servant, lackey, footman, flunky, flunkey, valet, valet de chambre [Fr.]; equerry, groom; jockey, hostler, ostler^†, tiger, orderly, messenger, cad, gillie^†, herdsman, swineherd; barkeeper, bartender; bell boy, boots, boy, counterjumper^†; khansamah^†, khansaman^†; khitmutgar^†; yardman.    bailiff, castellan^†, seneschal, chamberlain, major-domo^†, groom of the chambers.    secretary; under secretary, assistant secretary; clerk; subsidiary; agent etc. 758; subaltern; underling, understrapper; man.    maid, maidservant; handmaid; confidente [Fr.], lady's maid, abigail, soubrette; amah^†, biddy, nurse, bonne [Fr.], ayah^†; nursemaid, nursery maid, house maid, parlor maid, waiting maid, chamber maid, kitchen maid, scullery maid; femme de chambre [Fr.], femme fille [Fr.]; camarista^†; chef de cuisine, cordon bleu [Fr.], cook, scullion, Cinderella; potwalloper^†; maid of all work, servant of all work; laundress, bedmaker^†; journeyman, charwoman etc. (worker) 690; bearer, chokra^†, gyp (Cambridge), hamal^†, scout (Oxford). serf, vassal, slave, negro, helot; bondsman, bondswoman^†; bondslave^†; ame damnee [Fr.], odalisque, ryot^†, adscriptus gleboe [Lat.]; villian^†, villein; beadsman^†, bedesman^†; sizar^†; pensioner, pensionary^†; client; dependant, dependent; hanger on, satellite; parasite etc. (servility) 886; led captain; protege [Fr.], ward, hireling, mercenary, puppet, tool, creature.    badge of slavery; bonds etc. 752.    ... show more

Dutch: knul, knaap, jong, joch, gozer, jongen
Polish: chłopczyna, chłopaczek, chłopaczyna, chłopyś, chłopyszek, chłopczyk

A friendly informal reference to a grown man.

A male human offspring:
— His boy is taller than he is.

synonym: son.

Dutch: jongen, zoon, zoonlief
Polish: chłopiec, chłopak, syn