What's the difference between chivalry and knightliness?

Chivalry

Definition:

(n.) A body or order of cavaliers or knights serving on horseback; illustrious warriors, collectively; cavalry.
(n.) The dignity or system of knighthood; the spirit, usages, or manners of knighthood; the practice of knight-errantry.
(n.) The qualifications or character of knights, as valor, dexterity in arms, courtesy, etc.
(n.) A tenure of lands by knight's service; that is, by the condition of a knight's performing service on horseback, or of performing some noble or military service to his lord.
(n.) Exploit.

Example Sentences:

(1) Normally a very friendly fellow, the reasons for 'Arry's lack of chivalry remain unknown, but it's thought he may have been preoccupied by the prospect of bringing triffic fellas Emmanuel Adebayor and Benoît Essou-Akotto to Loftus Road on loan.
(2) Twelve months ago, Chris Hemsworth, the actor who plays Kevin, was in every multiplex as Thor , he of the unreconstructed chivalry and massive mallet.
(3) But the most surprising thing was the wording in the crimson ring: FOR GOD AND THE EMPIRE, this order of chivalry's motto.
(4) We are so much happier and rested now, and this arrangement lends itself to chivalry; on days when I arrive in the bedroom exhausted to find the fortress has been made for me, I feel spoilt indeed.
(5) Mr Osborne's hero, a self-pitying, self-dramatising intellectual rebel who drives his wife away, takes a mistress and then drops her when his wife crawls back, will not be thought an edifying example of chivalry.
(6) We have already gone through the excruciating experience of having the Queen herself wean us off the teat of the British honours system, a fixture of Australian distinction and chivalry that remained well after those fruity awards had turned rancid.
(7) Johnson was a puncher-boxer and dandy; Dempsey an uncomplicated hitter; Tunney had grace and nerve and fast feet; Louis’s fast hands punched in a blur of combinations, and he had a killer instinct as well as chivalry; Marciano had relentless oomph and steam-hammer cruelty.
(8) The age of chivalry is dead.” The novel’s theme, deftly laid out in a narrative that flashes backwards and forwards, to and from the 1930s, is the education of six wonderfully distinctive, heartless and romantic 10-year-old girls (Monica, Sandy, Rose, Mary, Jenny, and Eunice) and the covert classroom drama that leads to Miss Brodie’s “betrayal”, her peremptory dismissal from Marcia Blaine by her great enemy, the headmistress, Miss Mackay.
(9) Sampson found his book piled high alongside Le Carre's The Spy Who Came in From The Cold , Mary McCarthy's The Group , and Arthur Bryant's The Age of Chivalry .
(10) A few years ago, my novel Dodger took the reader back to times long gone to meet famous names of fact and fiction, and brought them together on a journey – ultimately – of chivalry.
(11) President Abdel Fatah al-Sisi’s office said in a statement: “History will never forget his numerous achievements in the defence of Arabism and Islam; acts which he performed with honour, honesty and sincerity, guided by truth, justice, chivalry and courage.
(12) Not unless you entertain some outdated idea of chivalry, I suppose.
(13) Jihad “promises adventure and asserts that the codes of medieval heroism and chivalry are still relevant,” Creswell and Haykel write.
(14) Younger women put a greater emphasis on physical characteristics in defining the conceptions and were more likely to note chivalry as an important factor between the sexes.
(15) To be specific, sexism is when men let you jump the queue and get on a crowded bus first in Delhi (to confuse matters further, that's called chivalry) and then the poor dears, willy nilly, get crushed up against you as their hands "accidentally" cup your breasts in a frenzy of misogyny.
(16) Men – some of them – stand up when a woman enters the room, behaviour originating in medieval codes of chivalry.