- The act of hatching.
- (often as mayfly hatch) The phenomenon, lasting 1-2 days, of large clouds of mayflies appearing in one location to mate, having reached maturity.
- An opening in a wall at window height for the purpose of serving food or other items. A pass through.
"The cook passed the dishes through the serving hatch."
- (slang) A gullet.
- (Scotland) A bedstead.
- (poultry) A group of birds that emerged from eggs at a specified time.
"These pullets are from an April hatch."
- A trapdoor.
- An opening through the deck of a ship or submarine.
- A floodgate; a sluice gate.
- Development; disclosure; discovery.
- A horizontal door in a floor or ceiling.
- (informal) A birth, the birth records (in the newspaper) — compare the phrase "hatched, matched, and dispatched."
- A small door in large mechanical structures and vehicles such as aircraft and spacecraft often provided for access for maintenance.
- A frame or weir in a river, for catching fish.
- (mining) An opening into, or in search of, a mine.
- (transitive, obsolete) To cross; to spot; to stain; to steep.
- (intransitive) (of young animals) To emerge from an egg.
- (transitive) To devise.
"to hatch a plan or a plot; to hatch mischief or heresy"
- (transitive) To shade an area of (a drawing, diagram, etc.) with fine parallel lines, or with lines which cross each other (cross-hatch).
- (transitive) To close with a hatch or hatches.
- (transitive) To incubate eggs; to cause to hatch.
- (intransitive) (of eggs) To break open when a young animal emerges from it.