In linguistics, an adjective (abbreviated) is a describing word, the main syntactic role of which is to qualify a noun or noun phrase, giving more information about the object signified.
An adverb is a word that modifies a verb, adjective, another adverb, determiner, noun phrase, clause, or sentence.
Aft is a naval term meaning towards the stern (rear) of the ship.
An aircraft is a machine that is able to fly by gaining support from the air.
In physics, a frame of reference (or reference frame) consists of an abstract coordinate system and the set of physical reference points that uniquely fix (locate and orient) the coordinate system and standardize measurements.
The mast of a sailing vessel is a tall spar, or arrangement of spars, erected more or less vertically on the centre-line of a ship or boat.
A navy or maritime force is the branch of a nation's armed forces principally designated for naval and amphibious warfare; namely, lake-borne, riverine, littoral, or ocean-borne combat operations and related functions.
In lexical semantics, opposites are words lying in an inherently incompatible binary relationship, like the opposite pairs big: small, long: short, and precede: follow.
The Oxford English Dictionary (OED) is the main historical dictionary of the English language, published by the Oxford University Press.
Prepositions and postpositions, together called adpositions (or broadly, in English, simply prepositions), are a class of words used to express spatial or temporal relations (in, under, towards, before) or mark various semantic roles (of, for).
A ship is a large watercraft that travels the world's oceans and other sufficiently deep waterways, carrying passengers or goods, or in support of specialized missions, such as defense, research and fishing.
The stern is the back or aft-most part of a ship or boat, technically defined as the area built up over the sternpost, extending upwards from the counter rail to the taffrail.
Terminology is the study of terms and their use.