The Collaborative International Dictionary of English v.0.48:

Spade \Spade\ (sp[=a]d), v. t. [imp. & p. p. Spaded; p. pr. &
   vb. n. Spading.]
   To dig with a spade; to pare off the sward of, as land, with
   a spade.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Spade \Spade\, n. [Cf. Spay, n.]
   1. (Zool.) A hart or stag three years old. [Written also
      spaid, spayade.]
      [1913 Webster]

   2. [Cf. L. spado.] A castrated man or beast.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Spade \Spade\, n. [AS. spaed; spada; akin to D. spade, G.
   spaten, Icel. spa[eth]i, Dan. & Sw. spade, L. spatha a
   spatula, a broad two-edged sword, a spathe, Gr. spa`qh. Cf.
   Epaulet, Spade at cards, Spathe, Spatula.]
   1. An implement for digging or cutting the ground, consisting
      usually of an oblong and nearly rectangular blade of iron,
      with a handle like that of a shovel. "With spade and
      pickax armed." --Milton.
      [1913 Webster]

   2. [Sp. espada, literally, a sword; -- so caused because
      these cards among the Spanish bear the figure of a sword.
      Sp. espada is fr. L. spatha, Gr. spa`qh. See the Etymology
      above.] One of that suit of cards each of which bears one
      or more figures resembling a spade.
      [1913 Webster]

            "Let spades be trumps!" she said.     --Pope.
      [1913 Webster]

   3. A cutting instrument used in flensing a whale.
      [1913 Webster]

   Spade bayonet, a bayonet with a broad blade which may be
      used digging; -- called also trowel bayonet.

   Spade handle (Mach.), the forked end of a connecting rod in
      which a pin is held at both ends. See Illust. of Knuckle
      joint, under Knuckle.
      [1913 Webster]

WordNet (r) 3.0 (2006):

spade
    n 1: a playing card in the major suit that has one or more black
         figures on it; "she led a low spade"; "spades were trumps"
    2: a sturdy hand shovel that can be pushed into the earth with
       the foot
    3: (ethnic slur) extremely offensive name for a Black person;
       "only a Black can call another Black a nigga" [syn: nigger,
       nigga, spade, coon, jigaboo, nigra]
    v 1: dig (up) with a spade; "I spade compost into the flower
         beds"

The Free On-line Dictionary of Computing (19 January 2023):

SPADE

   Specification Processing And Dependency Extraction.
   Specification language.  G.S. Boddy, ICL Mainframes Div,
   FLAG/UD/3DR.003