Women wear slacks for everyday function, dresses are part of their formal attire.
Men should wear a suit and tie and women should dress nicely. Either a pants suit of a nice dress. Formal attire to show respect.
Appropriate business attire for women can be casual attire such as slacks, sweaters, and long or short sleeve shirts. For more formal attire women can wear pant suits or dress suits.
Business casual attire is a step down from the original suit and tie. Men wear nice pants but no tie, just an open shirt. Women can wear pants or skirts with nice blouses.
Also, the pants are black.
Upscale attire generally means to wear a professional outfit. This consists of dress pants, shoes, and a tucked in undershirt. For women it means to wear a gown or dress that is classy looking.
Elegant attire and formal attire are similar in wear, with only minor differences. Elegant attire is usually worn at balls or requested events. Individuals invited to an event by the Queen of England would wear elegant attire. Formal attire is usually worn to a wedding.
Twill pants can be acceptable at an office if your dress code is business casual, or less formal than that. However, if your office maintains a dress code that requires formal business attire then your best bet is to either talk to your HR department to see if you can wear that material, or to just stick with your formal attire. It may be passable on Fridays since most offices tend to be quite lax about dress code on Friday, but again, check with your boss or your HR department.
This is a semi formal form of dressing. Women should wear knee length dresses and could wear a hat. Men can wear causal suits with a jacket but do not have to wear the jacket all the time.
Most gala dinners require you to wear formal attire. This would include a suit and tie or an evening gown. You would also want to wear fashionable jewelry and shoes to such an affair.
Pants and slacks are the same thing Pants is the everyday usage for a leg covering. Slacks are a more formal saying.
For women, semi-formal attire is somewhat flexible. Women can wear a dress, pant suit or dress suit. Preferred fabrics for semi-formal attire for women include silk, velvet, rayon, cashmere, high quality polyester brocades, or velour. Usually, anything silky goes. Except for cashmere, a wool business suit is not considered semi-formal attire since it is not dressy enough. Hem lengths in semi-formal attire dresses vary. Dresses can be cocktail dresses, no more than an inch above the knee, or they can extend to the ankle. Dress suits, for example, a silk suit, usually has a hem length slightly above, at or below the knee. Pants suits, again in silk, polyester, or cashmere, tend to be worn at the ankle. One can also wear dressy tops and tuxedo pants made out of appropriate fabrics and still fit into the semi-formal attire group. Generally semi-formal attire also means dress heels for women, usually in colors coordinating with one's outfit. However, a dressy flat or strappy sandal with the appropriate outfit is also considered semi-formal attire. Low, comfy flipflops are not dressy enough to be called semi-formal attire. For men, semi-formal attire means wearing a full suit, with vest optional. A tie, either bow or straight, should be worn, and the shirt should be a simple button down. Suit fabric choices are primarily wool gabardine or cashmere. However, a wool blend will do. Linen or seersucker suits are not formal enough for semi-formal attire. Dress shoes like oxfords are worn. It is not necessary to wear a tuxedo, and one might be considered a bit overdressed for a semi-formal event showing up in a tux.