↓

An arrow pointing down.

↓

1. Down, below.

   Antonym: ↑

2. Southward.
3. Indicating a decrease or reduction.

   Antonym: ↑

   • 2019, Antonis Fanouriakis, George Bertsias, “Changing paradigms in the treatment of systemic lupus erythematosus”, in Lupus Science & Medicine, volume 6 (in English), →DOI, page 3:

     Tapering scheme   ↓ 5 mg q week […]
     [Figure 2 A proposed algorithm for the handling of glucocorticoid (GC) therapy in patients with active or flaring SLE.]

4. (phonetics)

   (a) Ingressive airstream mechanism when used with a letter for an egressive sound, e.g. [s↓], [a↓], or percussive, e.g. [ʬ↓] for lips smacking apart, or (rarely) implosives such as [pʼ↓] for [ɓ̥].

   (b) Inhalation when used alone: [↓].

   Antonym: ↑

5. (chemistry) precipitate, precipitation
6. (go) an evaluation of a game position, down, defined as −↑ = {*|0}.^[1][2]

   Antonym: ↑

7. (computing) The down-arrow key on a computer keyboard, used for navigation and various keyboard commands.

(go): The evaluations ⟨↓ ⇓ ⤋ ⟱⟩ are equivalent to ⟨↑ ⇑ ⤊ ⟰⟩ with the positions of black and white reversed.^[1]

↓

1. (slang) Used to denote an unusually low intonation.

• ↑