in sailing trim can also refer to the sails being ready. I would probably not say "a trim yacht," but a yacht can be trimmed or more likely, the sails are trimmed on a yacht. A neat yacht is probably, as Ersa wrote, a clean or tidy yacht. It can mean interesting. Although, using "neat" that way sounds very dated, sounds like a phrase that would be used in the US in 1960s.

A neat yacht is correct neat = clean or tidy (clean in appearence or in habits, example: A neat person, but also it can be used for house, or yacht as in your example: A neat house) This is more something you see after a while trim = is both clean and organized (example: trimming hair) This is something you see at the moment or just a bit before Now that I am trying to explain I understand that it has similar meanings, I hope I explained it well :)

As Thomas as already pointed out. Trim or Trimmed in yachting parlance means ready to sail, referring to the sails being hoisted and set ready to sail. This sense of having something anything a machine or vehicle ready to go can be used in other contexts.

definitions for you to study. 1. TRIM : make (something) neat or of the required size or form by cutting away irregular or unwanted parts. "trim the grass using a sharp mower" 2. TRIM: decorate (something), typically with contrasting items or pieces of material. "a pair of black leather gloves trimmed with fake fur" 3. TRIM: adjective adjective: trim; comparative adjective: trimmer; superlative adjective: trimmest neat and smart in appearance; in good order. "his face was freshly shaved, his clothes neat and trim" 4. TRIM: trim verb [T] (CUT) to make something neater or more even by cutting a small amount off: He had a neatly trimmed beard. To trim is also to reduce: We have to trim costs by not making any unnecessary trips. ------------- 5. NEAT: adjective adjective: neat; comparative adjective: neater; superlative adjective: neatest arranged in a tidy way; in good order. "the books had been stacked up in neat piles" 6. NEAT: done with or demonstrating skill or efficiency. "a neat bit of deduction" 7. NEAT: Neat people like to keep themselves, their house, and their possessions tidy and in good order: Hassan is the neatest child I've ever met - even his shoes are clean! I try to be neat, but my husband is a slob. More examples She coiled her hair into a neat bun on top of her head. The castle has trim lawns and neat flower beds. Her garden is always very neat. We arranged the chairs in neat rows. His office is very neat. SMART Vocabulary: related words and phrases Want to learn more? Improve your vocabulary with English Vocabulary in Use from Cambridge. Learn the words you need to communicate with confidence. neat adjective (GOOD) mainly US informal good: That video game is really neat! More examples SMART Vocabulary: related words and phrases neat adjective (CLEVER) clever and simple: It would be a neat solution to the problem. They are close synonyms often used together.