diff --git a/src/mudlib/entity.py b/src/mudlib/entity.py
index 216d750..43aa27e 100644
--- a/src/mudlib/entity.py
+++ b/src/mudlib/entity.py
@@ -26,6 +26,31 @@ class Entity(Object):
     defense_locked_until: float = 0.0  # monotonic time when defense recovery ends
     resting: bool = False  # whether this entity is currently resting
 
+    @property
+    def posture(self) -> str:
+        """Return entity's current posture for room display.
+
+        Priority order: unconscious > fighting > flying > resting > standing
+        """
+        # Unconscious (highest priority)
+        if self.pl <= 0 or self.stamina <= 0:
+            return "unconscious"
+
+        # Fighting (only for Player with mode="combat")
+        if hasattr(self, "mode") and self.mode == "combat":
+            return "fighting"
+
+        # Flying (only for Player)
+        if getattr(self, "flying", False):
+            return "flying"
+
+        # Resting
+        if self.resting:
+            return "resting"
+
+        # Default
+        return "standing"
+
     def can_accept(self, obj: Object) -> bool:
         """Entities accept portable Things (inventory)."""
         from mudlib.thing import Thing
diff --git a/tests/test_entity_posture.py b/tests/test_entity_posture.py
new file mode 100644
index 0000000..d7d96fd
--- /dev/null
+++ b/tests/test_entity_posture.py
@@ -0,0 +1,172 @@
+"""Tests for Entity.posture property."""
+
+from unittest.mock import AsyncMock, MagicMock
+
+import pytest
+
+from mudlib.entity import Entity, Mob
+from mudlib.player import Player
+
+
+@pytest.fixture
+def mock_writer():
+    writer = MagicMock()
+    writer.write = MagicMock()
+    writer.drain = AsyncMock()
+    return writer
+
+
+@pytest.fixture
+def mock_reader():
+    return MagicMock()
+
+
+def test_entity_default_posture():
+    """Entity with no special state should be 'standing'."""
+    entity = Entity(name="Test", x=0, y=0)
+    assert entity.posture == "standing"
+
+
+def test_entity_resting():
+    """Entity with resting=True should be 'resting'."""
+    entity = Entity(name="Test", x=0, y=0, resting=True)
+    assert entity.posture == "resting"
+
+
+def test_entity_unconscious_no_pl():
+    """Entity with pl <= 0 should be 'unconscious'."""
+    entity = Entity(name="Test", x=0, y=0, pl=0.0)
+    assert entity.posture == "unconscious"
+
+
+def test_entity_unconscious_negative_pl():
+    """Entity with negative pl should be 'unconscious'."""
+    entity = Entity(name="Test", x=0, y=0, pl=-10.0)
+    assert entity.posture == "unconscious"
+
+
+def test_entity_unconscious_no_stamina():
+    """Entity with stamina <= 0 should be 'unconscious'."""
+    entity = Entity(name="Test", x=0, y=0, stamina=0.0)
+    assert entity.posture == "unconscious"
+
+
+def test_entity_unconscious_negative_stamina():
+    """Entity with negative stamina should be 'unconscious'."""
+    entity = Entity(name="Test", x=0, y=0, stamina=-5.0)
+    assert entity.posture == "unconscious"
+
+
+def test_entity_unconscious_beats_resting():
+    """Unconscious priority > resting priority."""
+    entity = Entity(name="Test", x=0, y=0, pl=0.0, resting=True)
+    assert entity.posture == "unconscious"
+
+
+def test_player_flying(mock_reader, mock_writer):
+    """Player with flying=True should be 'flying'."""
+    player = Player(
+        name="Test", x=0, y=0, reader=mock_reader, writer=mock_writer, flying=True
+    )
+    assert player.posture == "flying"
+
+
+def test_player_flying_beats_resting(mock_reader, mock_writer):
+    """Flying priority > resting priority."""
+    player = Player(
+        name="Test",
+        x=0,
+        y=0,
+        reader=mock_reader,
+        writer=mock_writer,
+        flying=True,
+        resting=True,
+    )
+    assert player.posture == "flying"
+
+
+def test_player_unconscious_beats_flying(mock_reader, mock_writer):
+    """Unconscious priority > flying priority."""
+    player = Player(
+        name="Test",
+        x=0,
+        y=0,
+        reader=mock_reader,
+        writer=mock_writer,
+        flying=True,
+        pl=0.0,
+    )
+    assert player.posture == "unconscious"
+
+
+def test_player_fighting_in_combat_mode(mock_reader, mock_writer):
+    """Player with mode='combat' should be 'fighting'."""
+    player = Player(
+        name="Test",
+        x=0,
+        y=0,
+        reader=mock_reader,
+        writer=mock_writer,
+        mode_stack=["normal", "combat"],
+    )
+    assert player.posture == "fighting"
+
+
+def test_player_fighting_beats_flying(mock_reader, mock_writer):
+    """Fighting priority > flying priority."""
+    player = Player(
+        name="Test",
+        x=0,
+        y=0,
+        reader=mock_reader,
+        writer=mock_writer,
+        mode_stack=["normal", "combat"],
+        flying=True,
+    )
+    assert player.posture == "fighting"
+
+
+def test_player_fighting_beats_resting(mock_reader, mock_writer):
+    """Fighting priority > resting priority."""
+    player = Player(
+        name="Test",
+        x=0,
+        y=0,
+        reader=mock_reader,
+        writer=mock_writer,
+        mode_stack=["normal", "combat"],
+        resting=True,
+    )
+    assert player.posture == "fighting"
+
+
+def test_player_unconscious_beats_fighting(mock_reader, mock_writer):
+    """Unconscious priority > fighting priority."""
+    player = Player(
+        name="Test",
+        x=0,
+        y=0,
+        reader=mock_reader,
+        writer=mock_writer,
+        mode_stack=["normal", "combat"],
+        stamina=0.0,
+    )
+    assert player.posture == "unconscious"
+
+
+def test_mob_default_posture():
+    """Mob with default state should be 'standing'."""
+    mob = Mob(name="Goku", x=10, y=10, description="A fighter")
+    assert mob.posture == "standing"
+
+
+def test_mob_resting():
+    """Mob with resting=True should be 'resting'."""
+    mob = Mob(name="Goku", x=10, y=10, description="A fighter", resting=True)
+    assert mob.posture == "resting"
+
+
+def test_mob_unconscious():
+    """Mob with pl=0 should be 'unconscious'."""
+    mob = Mob(name="Goku", x=10, y=10, description="A fighter", pl=0.0)
+    assert mob.posture == "unconscious"